Going down the rabbit hole of some of the referenced articles. I read this one [1] about Microsoft's attempts to resurrect the game. The problem seems to be the license agreement does not allow MS to release the game as a standalone copy. Not a lawyer but wouldn't it be pretty easy for MS to just re-license it? MS has a market cap of 2.3T, I think they could swing it without too much of a sweat.
[1]: https://devblogs.microsoft.com/oldnewthing/20181221-00/?p=10...