Just the recently I was called a barbarian for eating meat barehanded, without utensil or plate. It's so hard to hold the tears back; my people have infamously hunted and gathered north of the empire.
Alot of "an extra 15 years" is contingent on other people making sure normal everyday life doesn't take you out. You'll need family that wants to do this or you'll be at the mercy of healthcare systems that want to dose you up(or even outright kill you) for maximum profits.