https://wiki.gnome.org/Apps/Fractal is a GTK+-native #matrix client. Seems worth checking out!
/via https://social.heldscal.la/url/1545446 /by @deadsuperhero
They're talking about[0] splitting #Fractal into a Messenger app and a Discussions app. I think having different user experiences for those two use cases makes a lot of sense, but I don't know that it requires splitting it into two apps. But maybe it would make it easier to accommodate the changes necessary.
[0] https://blogs.gnome.org/tbernard/2018/05/16/banquets-and-barbecues/