I am planning to remove Google talk support from 4.4 onwards for Mac and iOS. Its an sad milestone because Google talk was why I made Monal in 2008. However, given google themselves have deprecated it twice and even its replacement google chat has been deprecated, it seems increasingly less important. Additionally, the fact that it does not support any modern xmpp specs and doesn’t work with push means it is barely usable in current versions of Monal. I don’t track user stats but I suspect everyone who used to use this for google has moved on to other clients or slack.
If you *REALLY* need Google talk the legacy mac client will still be around for a little bit.