1 - Migrating users with 'bot: true' attribute to use the new 'type' attribute: https://github.com/RocketChat/Rocket.Chat/blob/7b1e076cbcd6d33eb24dd4cf40e32cce5a62643e/server/startup/migrations/v041.js

2 - RC Apps take accounts with bot type into consideration when converting but not anywhere else: https://github.com/RocketChat/Rocket.Chat/blob/7ba14d1efdccd277682f58c820c33946605ab4f5/packages/rocketchat-apps/server/converters/users.js#L49

3 - Integrations take into account events of messages with the 'bot' property set as well as events coming from users with type 'bot', note that the bot role isn't taken into consideration: https://github.com/RocketChat/Rocket.Chat/blob/75d69f05fb129b930b72d638deabfeff545bf990/packages/rocketchat-integrations/server/lib/triggerHandler.js (multiple mentions)

4 - Two methods querying accounts with user or bot types, not sure what these methods have in special to be the only ones being that specific: https://github.com/RocketChat/Rocket.Chat/blob/fee30ad6f92aa648189757a29b80d1abe78abc40/packages/rocketchat-lib/server/models/Users.js

5 - Creation of the Rocket.Cat, with bot type: https://github.com/RocketChat/Rocket.Chat/blob/7e25b1ccc9797447aeb2c34208162ed2e9f9bff5/server/startup/initialData.js#L12

6 - Query all users with user or bot type to display the user list, real effect is displaying all users and the rocket.cat bot: https://github.com/RocketChat/Rocket.Chat/blob/9ed7613b7d2eee5dafa2eda9956bd9dc47692a81/packages/rocketchat-ui-admin/client/users/adminUsers.js#L90