I have them, they are great. Here are a few obvious things I’ve learned that I didn’t appreciate beforehand:

The complexity of the endeavor rises exponentially with the number of kids. That is to say, 3 is a much bigger leap from 2 than 2 was from 1.

They get dramatically more expensive and complicated as they get older. All that exhausting baby activity is the easy part. As you start to figure out how to do it, the rules shift and you have to get learning again.

I never imagined how much of adult life as a parent revolves around the literal management of shit. Between kids, pets, and aging parents, I just never expected to be so preoccupied with the logistics of excrement. I guess I was living in some kind of Disneyland in the before times. You sort of get used to it though. Sort of.