online*
I don't think it's illegal, or immoral*
If you want to (by which I mean if it does everything you need and you don't mind the UI)
personally I'm sticking with 10 for now and dreading October '25! - It's fine for most hings, but I prefer the start menu on 10 and can't find a way to manually assign sound outputs per app (like to have a vid on the TV and game coming out my desktop speakers, in cases where the game doesn't let you change it from the default)... even if that is a bit buggy at times on 10
*per the above response, overclockers sell it, so we can't discuss other options here