For me, Windows really could be an alternative to macOS in a year or two. WSL2 and Windows Terminal look great. Once their final version was released and the toolset is stable, it could get really interesting, really fast.
I have the same thought for the last couple of years, but I was never able to articulate it in a short and poignant way. In my opinion, Marco Arment's comment is exactly on-point. The shift to mobile and mobile design dumbs down interfaces and removes "power users" from the equation. Especially on the Mac!