How DRM ridden the Xbox Series is really sucks, but what's even sadder is seeing people defend mega corporations over their own interests as consumers. A bunch of people in the community have been talking about the issues with online DRM and game ownership/preservation like John from DF, MVG or DoesItPlay community on twitter, its kind of a silver lining that the recent GT7 and Xbox downtimes opened the eyes of some people to start understanding the problem.
I also wanted to refute two of the most common arguments brought up as a "defense" each time the discussion around Xbox DRM pops up:
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"Just set your console as home console" this only works after the game is installed, for disc games if you haven't installed the game yet you will most likely need internet to either finish the install (because Xbox Series discs are mostly just Xbox One discs without the next gen version on it) or to finish the one time activation for Xbox One games (you need to download a compatibility patch)
MVG made a video testing this out only game that worked is DMC 5 since it has a Series X only disc with the full game in it.
I also want to recommend this video that goes over the whole issue explaining it really well plus doing a lot of testing
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"Discs are just a download key anyway, the game is not completly on disc" This is a problem plaguing Xbox right now be it due to Smart Delivery support forcing them to have only the Xbox One version on disc or because they just don't care about releasing good physical releases (Halo Infinite, FH5, Flight Sim, all those discs are useless without internet) since most of the Xbox fanbase seems to prefer digital.
Physical releases on Nintendo's and Sony's platform seem to be mostly just fine (you can play and finish without ever needing internet), as proved by the testing done by DoesItPlay community on Twitter. You can check their findings here
https://docs.google.com/spreadsheets/d/1KB3dfTKMhudQD9OWVY8p0GRGvWqeblHAjsb8HsarzYU/edit#gid=0