Back about 18y ago there was, er, Trillian (?) and you could have all your chats in one UI at least. If I were in charge chat apps would have to use federation with an open interchange format (RIP XMPP).
I think XMPP and Trillian might still be going but once Facebook, Microsoft and Google stopped playing nicely ...
Oh, man, the good old days of Trillian. Yeah, you could be signed into multiple AIM accounts, MSN, ICQ, maybe others later on. It was a total game changer.
I think XMPP and Trillian might still be going but once Facebook, Microsoft and Google stopped playing nicely ...