I like WSL for this single reason too - it gives me space to run isolated experiments without touching my primary OS. So if that's what windows users get out of it, cool.

You can do the same thing with many other technologies on most other operating systems. I've used, in chronological order: FreeBSD jails, VMs, Cloud-hosted VMs, Docker, K8s, and Nix flakes. WSL is probably somewhere in around K8s.

My point is, we've had the ability to run "subsystems" for decades, by different names, on every OS. WSL is cool but quite late to the game, far from being "more powerful than linux".