It’s not enough for the output to be good; you have to feel like it was worthwhile. Building and shipping great software that goes on to have few or no users?

It’s not enough for the output to be good; you have to feel like it was worthwhile. Building and shipping great software that goes on to have few or no users? Burnout. Building widely used software but you come to believe it does more harm than good? Also burnout. Avoiding it requires believing in the value of the things you have done; imo overwork can only speed up the process, but will not cause it if you believe in the rightness of what you are doing.