Yeah, if Steam ceases to function, that will be the end of my last motivation to use Windows. Maybe they should take that into account, because Steam is ready to make the switch.
Although Mint is my primary OS, I bought a SSD + Win10 last year for Steam games. Most of them run on Linux, but a few are Win-only, and even some of the Linux-capable ones run a little better on Windows. The last version of Windows I purchased was XP, and Steam games are literally the only reason I bought a newer version. If Microsoft breaks Steam, I'm gone.