I was watching Halt and Catch Fire and in the first season the engineering team makes a great effort to meet something called the "Doherty Threshold" to keep the responsiveness of the machine so the user doesn't get frustrated and lose interest. I guess that is lost to time!
What is worse than that: not being able to predict if inputs will be buffered or dropped during unresponsiveness. I kind of look like an idiot when I keep clicking/typing away on someone else’s computer while things are frozen, thinking “oh, it’ll catch up in a bit”, and then 5 seconds later I have to work harder to fix the chaos: some keystrokes at the beginning made it through, then only every other one, then the next couple hundred got dropped, but the next 100 came through fine, and interspersed everywhere there are bizarre runs of duplicated keys, as if I had held the letter aaaaaaaaaaaaaa down continuously.
Everyone’s mix of hardware, OS, text editor, text editor plugins, etc makes this behavior highly variable, and hard to guess if it makes sense to keep typing or just wait out the frequent 1-5 second lockups.