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Windows 11 has made the “clean Windows install” an oxymoron
(arstechnica.com)
This is a most excellent place for technology news and articles.
Of the top 1000 games on Steam, only 38 currently don't run at all and 744 of those are Gold or Platinum status on ProtonDB. Having nearly 3/4 of the top 1000 games work flawlessly or nearly so is enough to not need Windows.
If for some reason it's not, you could dual boot, but I haven't run into a game in months I could not play.