Your points are fair, but color with the fact that the Windows Subsystem for Linux (WSL) is build to be distro-agnostic. We picked Ubuntu in this first version due to its popularity with developers, but there are few technical reasons (other than us fully and accurately implementing the necessary syscalls) why it shouldn't support other distro's userland environments in the future.

Knowing this, what should we call it?

Windows Subsystem for Running POSIX + Linux Syscall API Compatible Userland Tools? WSRPLSACUMT? :)

I'm genuinely interested on what you all feel would be a good way to think about naming moving forward.