That's cool. I felt I did, but that's subjective. But this is exactly the kind of thing I would like to have seen. Absolutely leave jobs when you feel you need

That's cool. I felt I did, but that's subjective. But this is exactly the kind of thing I would like to have seen. Absolutely leave jobs when you feel you need to, but work with your employer if you can to make the transition easier. Fulfilling your ambitions does not need to be damaging to anyone else. As you state, good employers should make this environment the norm. But the discussions I read here about quitting and joining startups don't deal with this side of the equation. They seem to mostly emphasize quitting as a defiant act or a personal milestone (which to me implies not caring about what state you leave things in). BTW, did your employer notice that you were unhappy and bring it up to you before you told them?