I’m been using Linux full time since 2004, and while I think it is good to let people know it is there, I don’t recommend it to people I’m not willing to personally support. But, I also let them know I just can’t help with Windows problems either, and they should address their complaints to their OS vendor.

I file Debian bugs if I have a problem with my OS, and have received fixes that way. This is better support that I ever received from MS during my first 2 decades of using MS OSes.