If system-wide themes really worked, I'd probably be switching now and then between light and dark themes. Dark mode is kind of gloomy but it's also easier on the eyes.
System wide themes used to work, and we didn't need an explicit Dark Mode because of it. Sadly, computer interfaces have regressed significantly from 1995.
Well, I meant something with more freedom of styling, not just some established light and dark theme. Like change the colors of system-wide buttons, text inputs, window title-bars, tabs, etc. Change the system-wide accenting color to Red, Blue, Green, Gold, etc.
