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 - Even RC Apps still takes accounts with bot type into consideration: https://github.com/RocketChat/Rocket.Chat/blob/7ba14d1efdccd277682f58c820c33946605ab4f5/packages/rocketchat-apps/server/converters/users.js#L49

3 - Checks whether a message object has the 'bot' property set. https://github.com/RocketChat/Rocket.Chat/blob/136e9caafedad5bad810d044ef510c5ef09533d6/packages/rocketchat-ui-message/client/message.html#L29 and https://github.com/RocketChat/Rocket.Chat/blob/136e9caafedad5bad810d044ef510c5ef09533d6/packages/rocketchat-ui-message/client/message.js#L19

4 - 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)

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, it will be changed to only users type as the bots will be displayed on a different view: https://github.com/RocketChat/Rocket.Chat/blob/9ed7613b7d2eee5dafa2eda9956bd9dc47692a81/packages/rocketchat-ui-admin/client/users/adminUsers.js#L90

7 - Two methods querying accounts with user or bot types, not sure what they have in special to query only these two: https://github.com/RocketChat/Rocket.Chat/blob/fee30ad6f92aa648189757a29b80d1abe78abc40/packages/rocketchat-lib/server/models/Users.js

8 - Example message to display on integrations view, a message object with a random 'bot' property set, note that all messages coming from integrations have the 'BOT' flag because the message object has the bot attribute set: https://github.com/RocketChat/Rocket.Chat/blob/23737a7a9707cce33697512b61093d1f315d3fad/packages/rocketchat-integrations/client/views/integrationsIncoming.js#L48

9 - Same as #8: https://github.com/RocketChat/Rocket.Chat/blob/9f883b897655971cf0533f29190516a2c24d352d/packages/rocketchat-integrations/client/views/integrationsOutgoing.js#L127

10 - Seems to fall on the note of #8 again, haven't read much to be sure: https://github.com/RocketChat/Rocket.Chat/blob/01d2aead1d9e61bb6752bde3e4728c677e41e38b/packages/rocketchat-integrations/server/api/api.js#L274