Students also tend to be younger. We could all survive on 4h as young adults, I imagine.

Our kid sleeps like crap, some nights I don’t get any full cycles (~90 minutes in adults).

I’ve no idea why we’re trying for a second, send help.

I read, "Our kids sleeps like crabs" It was interesting trying to figure that out.

Your second kid only takes half the effort. Half it again for a third. New parents always try to be perfect. It takes a while for them to get pragmatic.