1) Windows or macOS, depending on the project or customer provided hardware
2) Yep, the Year of Linux Desktop already happened, it is a VM hosted on 1)
(2) reads like "to be free, first you need to submit yourself to the Overlords".
I will take the minor inconvenience of having to run web apps over the dystopia you are willing to subject yourself to in the name of "optimization", thank you very much.
Two questions:
1) What is the primary OS for your desktop?
2) Would you sincerely make the argument that a world where everyone submits to a single design (Apple-style) would be better than an "organic" world where the barrier of entry is lower, but less "optimal"?