Xbox Series X shutting down when launching any game

Your answer is not satisfactory since the issue is specifically with Xbox Series X and S so far as I've seen, which are systems that came out well after Mixer shut down. I have been streaming on Twitch through my Series X and even I cannot stream a single game now, every game states "this game does not allow streaming" including games I HAVE streamed in the past.

So there's something else going on that is not "we shut Mixer down over a year before this console launched"

The only reason I don’t think Xbox 360 servers will be shut down anytime soon, even after series X comes out, is that you still have games that I’ve just been added to backwards compatibility and those games will continue on when series X comes out. A
lot of the backwards compatible games have multiplayer elements that need servers so it wouldn’t be a good idea to shut down games you just released.

Maybe Xbox Live is shutting down on the 360 to make way for the series x/series as s?

Hi,

Yes I did this the other day and it still shuts down after I quit the game, I have checked all my settings and nothing is set for the series x to shut down when I quit a game.

Its all up to you if you want to upgrade to the series x. I doubt at the stroke of midnight of launch day for the new console that microsoft will shut down the servers for the older consoles. People are still using their xbox 360s and original xboxs.