most mac apps aren't based on QT, they are based on cocoa, mac people don't need to use 3rd party when the official solution destroy the competition

macOS apps are smoother than windows apps because microsoft forces JIT'd applications, which hurts both startup and UX, you can feel JIT doing work when there are animations / click on buttons, and installation is slow because it copies a shit ton of DLLs and a massive runtime

even more noticeable on 120hz+ monitors

linux is the worst, people are addicted to python, and god knows how slow it is