Ubuntu)) I'm not denying that, with all of this + time, you can create a great operating system :) But Linux has one important drawback for me, as a gamer - it's the problem with Windows games. Yes, there is corresponding software, so you can play Heroes 3, and maybe even 5. But with new games that consume a lot of RAM - unfortunately...:(

It's somewhat problematic to do something custom in Ubuntu if you don't know the system. Ubuntu - IMHO (!) - is the same as Windows, only on the kernel of a real operating system, and it's free.
Regarding RAM consumption - Vista, in idle state, consumes about 500 MB, as far as I know. Windows 7 consumes about 200 MB in idle state (I have 70), and + the necessary applications consume about 400. Linux can load the entire system in 50-100 MB - everything else will remain on Wine + the game. In addition, Windows dumps a lot into the swap, even if there is still free RAM - it almost completely duplicates in the swap what it has in physical memory. Linux doesn't touch the swap as long as it has free RAM.

I agree. But for configuring Windows, I prefer third-party software.

Third-party software doesn't give you an understanding of how it all works - firstly, secondly, who knows what it's actually doing to your system, so I prefer to configure Windows manually, through the registry.

P.S. By the way, there is a version of Heroes 3 for Linux that works without any Wine or Cedege.;)