Yeah I think quitting early is a mistake, you want to figure out a way to ramp down for sure. Not certain what the trick is there, and doing it wrong can probably make stress worse.

At one past employer where crunch was a problem, some of the leads had an unofficial policy that after launch everyone could just quietly show up to work and not do anything for a few weeks to decompress. It helped a lot, but it kind of made me wonder why everyone was pretending there wasn't a problem.