@ryanc I do think some people just require different amounts of sleep, I pretty much average 6.5 hours of sleep a night and have done since I started wearing a smart watch at night (~2019). T'other half gets over 8 and I know people who seem to need 10.
I'm not too fussed: I go to bed when I'm tired and don't use an alarm for 3 days out of the week. It just means I get a couple of hours of "me time" every day.