I wanted to add:

* Adobe -> macOS

* Games with kernel anti-cheat -> mostly exist on PS5

* Office 365 -> Wasn't the point to make it cross-plat when they went services route (web, mac, ios)? Also, Wine.

What is this hard hitting class of applications that can't be addressed either by a mac, a Linux PC, or a console?

I'm not saying Windows has no purpose, but I do think the hard hitting killer application cohort is wearing thinner than it ever has.