To sell Windows laptops to the same crowd that buys Apple laptops to develop GNU/Linux software, instead of supporting Linux OEMs, and are unhappy that Apple only cares about developers on Apple ecosystem.
Microsoft understood that they only care about having some kind of POSIX support, and nowadays being Linux compatible is more relevant than straight POSIX, as the BSDs and IllumniOS also found out with their compatibility layers.
You were confused why people would do things with GNU/Linux without "supporting GNU/Linux vendors".
But that's restricting it to people that use the preinstalled OS, which is strange, because of how fitting it is to install your own copy of GNU/Linux.
That was the whole point of this thread, naturally some rather move goal posts to avoid the subject that Linux users rather give money to proprietary desktop platforms than help desktop Linux ever become a reality.
It takes me 2 minutes to install WSL Ubuntu. Or I could spend half a day on figuring out a hacky solution to a Windows/SSH/XWindows workflow that offers even a comparable level of integration. It will grow into weeks of obsessive tweaking until I feel compelled to write a blog post for HN where I show my sick setup and hours and hours I dumped into this, while meaningful work piled up in my TODOs.
In what concerns Microsoft, I praise them for having acknowledged the strategy error that was not giving the UNIX subsystem the same love as Win32.
Because as proven by macOS and now WSL adoption, GNU/Linux would never have taken off if PCs already had a mature set of POSIX toys, given that its users care 0% about GNU/Linux, and would be deploying to HP-UX, Solaris, Aix, Irix, Tru64 just as well.
Microsoft understood that they only care about having some kind of POSIX support, and nowadays being Linux compatible is more relevant than straight POSIX, as the BSDs and IllumniOS also found out with their compatibility layers.