Google has dropped support for XMPP (chat) and calDAV (calendar syncing). What's next? cardDAV? IMAP?? Honestly I can see that Google is no longer interested

Google has dropped support for XMPP (chat) and calDAV (calendar syncing). What's next? cardDAV? IMAP?? Honestly I can see that Google is no longer interested in open protocols. They are afraid that it's too easy for their users to simply migrate everything away. Their response is to build a wall around their users. Enough red flags have been raised for me to, unfortunately, say goodbye. Perhaps I may still buy their hardware, but they want to isolate my data from every company but them. They are no longer reliable.