It's absolutely subjective / personal. That being said, (non-mobile) OSs are less crucial, provided you have a browser. For a while I was having to move back and forth between Win and Apple. Being more browser-based made that less friction-y. Frankly, I think that's universally a good position to be in. That is, ultimately I don't care what OS. I'll be okay.

Humans adapt. It's what we do. Yet so often we mistake wants for needs.