To be honest, I would prefer OSes to just offer some rendering primitive instead. Remove the "layers of crap" (I'm quoting John Carmack), and let developers do

To be honest, I would prefer OSes to just offer some rendering primitive instead. Remove the "layers of crap" (I'm quoting John Carmack), and let developers do whatever. At this point HTML+JS is one option that gives a good amount of flexibility and support, and it looks like OSes should just be a browser. In my view, any OS should be able to use any windowing manager at the same time, provided they can use the same rendering core. I like building simple interfaces using SDL or SFML, and as long as you only redraw when needed, it's just good enough. The godot editor works that way, that's how it's able to work on all platform: you have a small throbber that turns indicating when it's redrawing.