Microsoft should wake up one day and simply recognize that everything that came after Windows 7 had been a terrible mistake, and they should re-release Windows 7. The world would be a beautiful place if that ever happened.
I love WSL but what does it do that cygwin didn't? I guess let you use the distro directly including package manager. But a VM can do that. And WSL2 is just Hyper-V virtualization, that's all it is.
So it's nothing really new here, if you want this on Windows 7, then just install Virtualbox/Hyper-V/whatever, create a Ubuntu VM (with shared folders), configure it to launch at Windows startup, and create a launcher shortcut to SSH into it.