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Gamepass vs Physical games
(beehaw.org)
Generally worth it.
There are lots of games on there that I'm interested in playing but don't feel it is worth spending $20+ on. And even if there are only a few day one releases I would want to buy on there, it pretty much pays for itself.
They do rotate non first party games in and out. Usually there is a "leaving soon" notice posted. When the game is removed you can't start it any more but you save/data is still preserved. If you really want to keep playing you can buy the game and pick up where you left off. This has happened to me zero times (most games left after I was done with them).
Re: ultimate, yes and I think access to games on the PC too?