It is very much true that there's a very large amount of things that could be improved on the status quo with rather minimal amounts of effort, that could resol

It is very much true that there's a very large amount of things that could be improved on the status quo with rather minimal amounts of effort, that could resolve a vast majority of the brokenness of responsiveness of UIs. But decreasing dropped frames/inputs by 10x or 100x is still just simply not gonna make it "real-time". I remember the windows lock screen being particularly annoying (an animation had to finish..?) but on Linux Mint I've always been able to start typing away immediately, so much so that I start blindly typing in the password before my monitor has finished turning on. Properly queueing events (keyboard ones at least) should be pretty simple to do properly, but of course many things still get it wrong.