Well, different market really. Afaik, Sketch is still macOS only.
For feedback and handoff the web tool is free and works in any OS that has a browser.
Yet it entirely lacks value.
Greater design positions don’t rely on Mac’s lol so why should more simple design?
Yet, I still don't believe "most" designers use Sketch, except in some "niches" like startups for example, or really design-heavy industries. Probably differs wildly by country too. What I've seen used most in the wild is Figma and Adobe tools, a lot of times on Windows.