I’d still use JF if no one else did. It’s convenient for streaming. The alternative would be maybe kodi and samba and that’s three steps back, two forward imo. I use xmpp for notifications a lot, its close integration with the server its on allows for using it kinda like ntfy.
The VC money won’t let Matrix die. The community support won’t let XMPP die.
I know which I respect more.