Agreed. It seems to me that burnout from work would only be qualified if burnout from play was a thing - because work to the fortunate among us, is play. Managing expectation is key, or more palpably perhaps - anticipation. The scientist, Robert Sapolsky, has done some interesting work on how dopamine affects behaviour. He shows that we get far more pleasure/dopamine from anticipation [future] rather than reward [present], where dopamine dries up. Our endurance is largely about our perception of the future. Good video here if anyone is interested: https://www.theguardian.com/science/punctuated-equilibrium/2...

In my case, it was due to crunch time shortly before release, and then after the project was released falling into a void of not knowing how to fill my time.

Which caused stress and eventually a burnout that I am only just slowly getting out of, after about 5 months.

I suppose it is different for each person though.

Spot on. When I was younger I could do 15 hour days without looking at the clock when orders were coming in and shipments were going out. Reward is a big motivator for time invested.