This is a case of you having some very specific requirements that can only be met in a certain way, that being Windows in this case. Whether or not a switch makes sense depends on how important those requirements are to you. Seems perfectly reasonable to me.
I personally found the ability to override a game’s rendering settings to only be worth it in very few cases but that’s me. But if you use it a lot then you use it a lot.
As for AI upscaling, my main issue there is that Nvidia chose a name so generic that it’s hard to google. And then they made a second unrelated feature with a very similar name.
There is AI video upscaling for Linux but it probably doesn’t work quite the same way Nvidia’s offering does. That might be a problem or it might not; I admittedly only invested a minute to look it up so I don’t have any details.
The same applies to SDR-to-HDR. There seems to be something but it probably doesn’t work like what you currently use.
So in the end you’ll have to decide whether you’d be more annoyed by not having those features or by having to use whatever zany shit Microsoft come up with. Not a great decision but that’s life.
I personally might have stuck with Windows longer on my desktop if my 4080 hadn’t turned out to be wonky and Nvidia’s driver hadn’t turned out to be so capricious that I had to spend two months ruling out plausible error causes. That drove me back to AMD, which made the switch easy. But again, that’s me and not you.
NATO without the USA loses a lot of logistical and conventional power but is still backed by French and British nukes. That should still make Putin wary of actually triggering Article 5.
Besides, Germany has already demonstrated how effectively it can use a war economy so a conventional war against NATO-without-the-States would probably either be quick or an attrition slog. And I don’t think that Russia has the means to pull off either without directly bringing China into the war.
I do agree that Europe should do more, although Russian psyops have been effective over here as well – fringe parties are on the rise and conveniently all of them happen to like Russia. What a coincidence. That plus the economic downturn expected after Trump takes a sledgehammer to global trade again puts a damper on our effectiveness.