Windows is not "absolutely fine". Ignoring the garbage heap of bad/inconsistent ui/adverts/nagware. Its just not even capable of running a lot of dev software. The guide for running ruby on rails on windows is basically just to install a linux VM.

I'm running a lot of dev software and I never had to revert to Linux VM.

https://rubyinstaller.org/ Ruby for Windows.

I don't know why Ruby on Rails require Linux, but those reasons are not technical.

It runs perfectly fine lot of developer software, for those of us that are Windows developers first, and something else secondly.