What would you recommend?

> input lag is the topmost issue

IME this is a massive problem on windows and android and apple actually gets it right. They occasionally have stupid animations but those animations are responsive and trigger immediately. I don’t experience 3-5 second stalls (seriously the share dialog on android is a disgrace, and the windows start menu has become the least reliable part of the OS), and the input devices track to on screen movements - something I can’t say for win/android.