Settings > Accessibility > Slow Keys on MacOS. Turn that on and set the delay to maximum. Now, presumably there's a number that annoys you, and even though you spend most of your time switching between apps it will annoy you when you write. So if you get annoyed there, you must imagine that there is some bell curve of reaction speed. Absent any information, it's worthwhile to imagine you at the center, a pretty median slow guy. In that universe, there is some guy who will be three standard deviations faster. Just like you were annoyed when Slow Keys was on, he's annoyed when he's in the usual mode.