My project is java ant web app, which I normally open with 8.2 (or 9 if I install de Java EE Base module).

As expected, netbeans 10 wouldn't recognize my project out of the box, so I tried to install Java EE Base trough the 8.2 Plugin distribution portal like we did with Netbeans 9 (http://updates.netbeans.org/netbeans/updates/8.2/uc/final/distribution/catalog.xml.gz) and got the following error.

Warning - could not install some modules: JAX-RPC service provider SPI/API - The module named org.netbeans.modules.j2ee.dd.webservice was needed and not found.
JAX-WS service provider SPI/API - The module named org.netbeans.modules.j2ee.dd.webservice was needed and not found.
JAX-WS service provider SPI/API - The module named org.netbeans.modules.websvc.jaxwsmodel/1 was needed and not found.
 Web Service Client SPI/API - The module named org.netbeans.modules.websvc.jaxwsmodel/1 was needed and not found.
 JSP Lexer - The module named org.netbeans.modules.el.lexer/1 was needed and not found.
 Java EE Server Registry - The module named org.netbeans.modules.j2ee.dd/1 was needed and not found.
Amazon Elastic Beanstalk - The module named org.netbeans.modules.cloud.common was needed and not found.
Web APIs - The module named org.netbeans.modules.j2ee.dd/1 was needed and not found.
JSP Parser - The module named org.netbeans.modules.j2ee.dd/1 was needed and not found.
EjbJar APIs - The module named org.netbeans.modules.j2ee.dd/1 was needed and not found.
J2EE Support Utilities - The module named org.netbeans.modules.j2ee.dd/1 was needed and not found.
J2EE Support Utilities - The module named org.netbeans.modules.javaee.specs.support/0-1 was needed and not found.
Web Freeform Project Support - The module named org.netbeans.modules.j2ee.dd/1 was needed and not found.
Web Freeform Project Support - The module named org.netbeans.modules.web.jsfapi/0-1 was needed and not found.
RESTful Web Service Support API/SPI - The module named org.netbeans.modules.j2ee.dd/1 was needed and not found.
RESTful Web Service Support API/SPI - The module named org.netbeans.modules.javaee.specs.support/0-1 was needed and not found.
JBoss Application Server - The module named org.netbeans.modules.j2ee.dd/1 was needed and not found.
JBoss Application Server - The module named org.netbeans.modules.javaee.specs.support/0-1 was needed and not found.
JSP Core - The module named org.netbeans.modules.j2ee.dd/1 was needed and not found.
Tomcat (TomEE) - The module named org.netbeans.modules.j2ee.dd/1 was needed and not found.
 Tomcat (TomEE) - The module named org.netbeans.modules.javaee.specs.support/0-1 was needed and not found.
Web Services Core - The module named org.netbeans.modules.j2ee.dd/1 was needed and not found.
Web Services Core - The module named org.netbeans.modules.websvc.jaxwsmodel/1 was needed and not found.
Web Services Core - The module named org.netbeans.modules.javaee.specs.support/0-1 was needed and not found.
Web Services Core - The module named org.netbeans.modules.j2ee.dd.webservice was needed and not found.
Web Services Core - The module named org.netbeans.modules.websvc.restapi/0-1 was needed and not found.
Web Services Core - The module named org.netbeans.modules.websvc.projectapi/0-1 was needed and not found.
Oracle WebLogic Server - The module named org.netbeans.modules.j2ee.dd/1 was needed and not found.
Oracle WebLogic Server - The module named org.netbeans.modules.javaee.specs.support/0-1 was needed and not found.
Web Refactoring - The module named org.netbeans.modules.j2ee.dd/1 was needed and not found.
Java EE Shared Project APIs - The module named org.netbeans.modules.j2ee.dd/1 was needed and not found.
Java EE Shared Project APIs - The module named org.netbeans.modules.javaee.specs.support/0-1 was needed and not found.
Enterprise JavaBeans Core - The module named org.netbeans.modules.j2ee.dd/1 was needed and not found. Enterprise JavaBeans Core - The module named org.netbeans.modules.j2ee.dd.webservice was needed and not found.
Web Projects - The module named org.netbeans.modules.j2ee.dd/1 was needed and not found.
Web Projects - The module named org.netbeans.modules.websvc.jaxwsmodel/1 was needed and not found.
Web Projects - The module named org.netbeans.modules.javaee.specs.support/0-1 was needed and not found.
Web Projects - The module named org.netbeans.modules.j2ee.dd.webservice was needed and not found.
Web Projects - None of the modules providing the capability org.netbeans.modules.serverplugins.javaee could be installed. Web Services Manager - The module named org.netbeans.modules.websvc.jaxwsmodel/1 was needed and not found.
JSF Support - The module named org.netbeans.modules.j2ee.dd/1 was needed and not found.
JSF Support - The module named org.netbeans.modules.web.el was needed and not found.
Java EE Deployment Descriptor Loaders - The module named org.netbeans.modules.j2ee.dd/1 was needed and not found. JSP Editor - The module named org.netbeans.modules.el.lexer/1 was needed and not found.
JSP Editor - The module named org.netbeans.modules.web.el was needed and not found.
Java EE Base - The module named org.netbeans.modules.javaee.beanvalidation was needed and not found.
Java EE Base - The module named org.netbeans.modules.javaee.wildfly/1 was needed and not found.
Java EE Base - The module named org.netbeans.modules.websvc.jaxws.lightapi was needed and not found.
Java EE Base - The module named org.netbeans.modules.web.client.rest was needed and not found.
Java EE Base - The module named org.netbeans.modules.glassfish.javaee/0-1 was needed and not found.
Java EE Base - The module named org.netbeans.modules.websocket was needed and not found.
Java EE Base - The module named org.netbeans.modules.javaee.api was needed and not found.
JSF Editor for XHTML - The module named org.netbeans.modules.j2ee.dd/1 was needed and not found.
JSF Editor for XHTML - The module named org.netbeans.modules.el.lexer/1 was needed and not found.
JSF Editor for XHTML - The module named org.netbeans.modules.glassfish.javaee/0-1 was needed and not found.
JSF Editor for XHTML - The module named org.netbeans.modules.web.el was needed and not found.
31 further modules could not be installed due to the above problems.

Now, I know Java EE related libs have been removed from the JDK, ¿But does that mean that you'll remove Java EE functionality from the IDE? I don't know If I should file an issue or not because I don't know if this is expected behavior.

It should be noted that after hitting "Disable modules and continue" everything seem to be working fine, for example, even after getting the message "JSP Editor - The module named org.netbeans.modules.web.el was needed and not found" expression language seem to be working fine while editing JSP.

I have another newer smaller java web project but this one is maven-based, and NB10 recognized it out of the box, so I don't know if there is something in my ant-based project that I would have to update to make it NB10 recognize it without having to install Java EE Base module (if indeed you intend to remove it)

My project is not really Java EE , its more "Java EE Web Profile" (Mainly Servlet/JSP) but since it was created with a very old version of netbeans, j2ee.platform is set to 1.5 in project.properties, I'll experiment with that value during the weekend.

Cheers, and thank you for your work in Netbeans 10!