There are also Windows users who rely on niche business applications. Wine isn’t great for that sort of software yet. Another big one is the creative industry. While the VFX industry is very Linux-focused, and 3D is very viable, other parts of video production are not. And GIMP needs non-destructive editing before it can even think of competing with Photoshop or Affinity Photo. Inkscape is a viable vector image tool. The many other Adobe programs don’t have great alternatives, and if you need to collaborate, that means you all need to switch to a new program. Then there are the retraining costs to consider.
Gamers have the easiest time in switching to Linux. The amount of compromises and sacrifices you need to make in other industries are much greater right now.
However, Adobe is trying to bring some of their programs, like Photoshop, to the web. It’s unlikely we’ll see stuff like After Effects on the web, but Photoshop, Illustrator, maybe even inDesign could possibly, maybe be there in a few years. Photoshop web is already in beta (though it’s garbage). The web continues to be the great equalizer.