I haven’t tried it yet but it is an interesting idea for an app. My initial thoughts are: if I have something that seems to be important or significant that I wrote down near the start of my note, I would probably type gibberish or nonsense if I wanted to prevent it from being erased. Is there some way to ameliorate this situation where I would end up padding the note with fluff? My guess is to just make the timer shorter. Or maybe have some “checkpoint” for a longer timer.
Also, when it comes to handwriting, is there a way to support this input? I’ll say that a lot of left-handed writers have the opposite issue when writing with ink on paper. If they write too fast, most of them will end up smudging what they just wrote. This is not an issue on electronic writing devices of course.