Ive run the pimoroni fan for as long as ive had the 4: https://learn.pimoroni.com/tutorial/sandyj/getting-started-with-fan-shim https://learn.pimoroni.com/tutor

Ive run the pimoroni fan for as long as ive had the 4: https://learn.pimoroni.com/tutorial/sandyj/getting-started-with-fan-shim https://learn.pimoroni.com/tutorial/sandyj/getting-started-w.... (And use one of their “cases” too). It only runs when im really crunching along or watching youtube on the tv. And even then it cools down enough to not need it sometimes. With the pi, even setting up the fan turned into an adventure in customized settings to tweak how the fan runs. Not complicated, but enough to grab my interest for a little. Even still, the fan kicks on infrequently enough, and cools down quickly enough, I suspect a heat sink could easily take care of the heat in most cases.