I find that most of the linux-like versions of user-space tools can be installed via homebrew. What functionality would you been hoping for from a linux vm?
would this VM be able to have any GPL v3 licensed tools?
Yeah, the drive for a "WSL" is really because Microsoft/Windows doesn't play nice with the *nix world of tools/commands that developers are falling in love with.
With OSX, the terminal experience is great, no need for a "WSL" over there!