My personal experience has been frustrating each time. I've tried to switch over at least 3 times over the years, but I always gave up. This time, I installed Ubuntu and immediately had to spend 3 hours trying to get my Xbox controler dongle to work, but just couldn't do it. Found a driver online that people said would work, it didn't because it wasn't properly signed, tried to sign it but the signing app just didn't create the certificates needed. Gave up, I have Bluetooth so I'd live, though I'd rather use the dongle if I can.
I then immediately encounter another problem that couldn't be fixed (for the life of me I can't remember what it was exactly) and just gave up.
The previous time I tried it I remember that among other things, one of my main problems was the lack of clipboard history (which I use extremely often). I tried installing an app for it but all of them either didn't work or didn't work the way I want them to or I just didn't like their look and feel.
I also hate the font rendering on Linux, it always looks blurry compared to Windows, and the double titlebars most apps have (e.g. Discord, at least on Ubuntu), I like my screen real-estate.
Honestly? Sure. The NATO shield will still exist so it doesn't affect the security of European countries much, and it only reduces American military influence abroad by reducing their capabilities to respond to events in the region, so what do we care? We should be investing more in defense regardles of whether the Americans pull out or not.