I think it just depends on the person, I'm sure there are people who do just fine with 6 or 7 hours a sleep on average per night but If I don't get 8 or close t

I think it just depends on the person, I'm sure there are people who do just fine with 6 or 7 hours a sleep on average per night but If I don't get 8 or close to it I do suffer (there probably are people who need 10 hours a night as well). The suffering however isn't instant it may even take a day or two to catch up but it is noticeable.