Mac is a pc lol. But to answer your question, I use linux (fedora) on my desktop pc and windows on my laptop, mainly for university purposes.
It's a bit of both, to be honest.
No, but it's actually really easy to run Windows software on linux (at least most windows apps). All you need to do is install Wine or Bottles and you're pretty much good to go.
And gaming is also really easy to set up on linux. Especially so after the steam deck came out.