1. A much better discrete GPU which can run titles in 4k.
2. Ability to run games cause windows has DirectX.
3. Ability to run Linux natively using WSL.
4. Expandability - You can add components like more RAM or an additional GPU.
But what are you doing in WSL that you can't do on a Mac (or, of course, a Linux machine) without a 'subsystem'?
Sincere question, because the 'Mac is not Linux' things that wind me up tend to require X11 to fix, WSL would be no different.
Using Macports or homebrew gets you most of the packages that are available for the various Linuxes, GNU utilities etc.
[1] https://en.wikipedia.org/wiki/Darwin_%28operating_system%29
Oh, I didn't know that, that does make it a bit more interesting to me!
I still think I'd be frustrated (as I am on Mac) with the lack of a configurable (or even of a choice of) window manager though.