Sunk cost fallacy. I think there is something to it, not always just a fallacy.

Example I was thinking about today: Uprooting one's family and moving to a new place, building out relationships with new locals, planting new roots. Will they accept you as well as they did in your previous community? Maybe you are in a different age group by now and haven't yet figured out how to effectively find friends. Maybe you have to relearn the seasons and what grows best if you move far enough.

That may be part of an evolutionary biology explanation for why sunk cost is something we might overcompensate for.