[jen20]

They already ship curl. In doubt the license is the thing stopping it, but there is some precedent here.

WSL (v2) is just a fancy wrapper around a Linux VM though, so the tools you get there are from the distro, not Windows.

[aragilar]

No, they don't ship curl, see https://daniel.haxx.se/blog/2016/08/19/removing-the-powershe... and https://github.com/PowerShell/PowerShell/pull/1901.