Not sure what you want to tell me exactly, as the above also applies to Gentoo ^^…

But I guess as a Gentoo user you have a lot of discipline then?

You cannot reinstall Windows, if you’ve never installed it ¯\(ツ)/¯

Yep tinkering with the system is probably the main issue (for that NixOS is awesome btw.). But even when you’re not constantly tinkering. System-State accumulates over time, bugs are also apparent in (upgrading of) distros, and the maintainers of a distro cannot realistically handle every upgrade time-point x -> y, so stuff will likely break after some time.

But even when I have fixed all the issues in my previous at some time broken distros, at some point it just feels good to have a freshly installed system without all that dirty accumulated state (NixOS + impermanence and you’ll have that every reboot :P, see also this)

You probably don’t have much on that system and/or you have a lot of discipline…

I did reinstall it after max 1 1/2 years (Arch btw.), either because of breakage, or weird behavior, or it was a chaotic dumpster fire.

At some point I discovered NixOS and was sold (and am still sold after 3 1/2 years using it). But it has a steep learning curve, though it certainly got better over that time.