It felt like a mental "click" but not like you get when you have been trying to solve a puzzle... it felt like a mental " gear change ".
My thought processes changed order or priority, Things that I felt were important before were suddenly less important and I think I things from a different angle (not just life stuff but problem solving approaches.).
its really hard to describe.
What I can say is that having a second didnt do a damned thing... lol whatever change was going to happen only happened on the first.
Very possible that been a father cornered you to think more pragmatically in daily life, and that translates to how you do things at work.
I definitely felt a change in perspective like this. Sitting in a 1hr long meeting, going over something which could be done in 10 mins, and the whole time thinking "none of this even matters, there's a human life at home which I helped create!".