My guess is that indeed the usage is low and people didn't bother to update stats or put more efforts into it. But the real reasons, in my opinion -- On the desktop, PWAs are simply less relevant. People are mostly online, and there is little difference between PWA and a "real" website, so people would just go to the website instead of "installing" it. Most "heavyweight" applications like VSCode, Photoshop and Premie…
Android is the dominant mobile OS in the world.
> As a developer you don't want to spend time developing PWAs that only run on Android phones, so you might not bother at all.
You will be developing two apps anyway, so...