People install Windows when they want to play games that only run on Windows.
It’s this primarily.
Secondarily Linux is still a pain in the ass in a lot of ways. I’ve been playing with Linux for a few years now after being exposed to it at work. I love Linux but when I dual booted (Ubuntu) and tried to daily drive it a year and a half ago on my desktop it was a nightmare. I literally came back after one day and nothing worked. Sometimes I’m down to troubleshoot, sometimes I just want games to work. Granted, Proton has come a long way and most of what I try on the Steam Deck just works.
It’s this primarily.
Secondarily Linux is still a pain in the ass in a lot of ways. I’ve been playing with Linux for a few years now after being exposed to it at work. I love Linux but when I dual booted (Ubuntu) and tried to daily drive it a year and a half ago on my desktop it was a nightmare. I literally came back after one day and nothing worked. Sometimes I’m down to troubleshoot, sometimes I just want games to work. Granted, Proton has come a long way and most of what I try on the Steam Deck just works.