WSL1 had / has really bad filesystem performance. Git commands would take ages on large repos as a example.
WSL2 has a linux fs which is fast and a bridge to windows fs which is still slow but I just live on the linux fs. WSL2 also runs native docker (and windows docker client and leverage the docker daemon in wsl).
It’s getting better but the inconsistent UI (Control Panel and that other thing) and garbage that comes with it is still quite annoying. There’s probably some corporate environment to avoid the latter, but I’d still rather not have random apps installing when I simply buy the pro version.
I miss having access to Windows games.