And maybe also the press duration; even with preserved auto-repeat, there seems to be quite a variety in typing: getting duration from key-down to key-up between 30 and 120 milliseconds. Naturally we can "squeeze" it up to auto-repeat threshold, which is usually around 500 ms.

What surprised me is how often I have concurrently pressed two or more keys during typing, never occurred to me how frequently key press of the next key happens before the previous key was released. It could also be interesting signal perhaps.)

E: key press duration measurements doodle: https://codepen.io/myf/full/KwPwVWE