I mean more - if you are not getting value out of maintaining it anymore and there wasn't enough interest to make the project self-sustaining without you. But

I mean more - if you are not getting value out of maintaining it anymore and there wasn't enough interest to make the project self-sustaining without you. But also sometimes things change, what was a good solution once might not be a good solution now. There is no one answer, all im saying is that there is nothing wrong with moving on if the project no longer interests you.