I've been tasked with improving a system where a lot of the events relied on timing to be just right, so now I routinely click around the app with a 900ms delay, as that's the most that I can get away with without having the hot-reloading system complain.

Plenty of assumptions break down in such an environment and part of my work is to ensure that the user always knows that the app is really doing something and not just being unresponsive.