I considered the age thing, but given the rapid paradigm shift here (pre-kid, post-kid), I think that can be dismissed. That I can feel the same with 2 - 2.5 h

I considered the age thing, but given the rapid paradigm shift here (pre-kid, post-kid), I think that can be dismissed. That I can feel the same with 2 - 2.5 hours less sleep than I did a year and a half ago suggests to me that I have conditioned myself.