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That was people fault for not using XMPP more to interact with people on Facebook¹. If GMail could do the same it would, but it can't because too many people use other email providers.
We just need to continue to use FOSS AP servers and if Meta & Co drop AP support at some point, well it will be bad for their users only, not for us.
1: I did my part at the time by chatting with Facebook users with a XMPP client on my Nokia 6630, incredibly at that time there was any other way to chat from mobile on Facebook.
