VSCode with WSL with Nginx & PHP 7.1 only has one issue currently. A bug with fastcgi buffering which I have documented here: https://github.com/Microsoft/WSL/issues/3687

Yes. It's a little bit slower but for development local environments it really does not matter.

I actually set this up for the Windows devs at work but I still use a 2014 MBP.

Our ionic app though is a huge pain in the ass that requires Visual Studio to setup a decent dev environment in native windows.