people who never got hangovers when they were younger, is it still like that today?

I remember the first time I drank alcohol. I got pretty wasted, though not to the point of blacking out. The next morning, I looked around and saw everyone else struggling with hangovers, while I felt perfectly fine. At first, I thought maybe I’d just gotten lucky — but it turns out that wasn’t the case.

Every time I’ve drunk heavily, even to the point of blackout, I’ve woken up the next day feeling completely normal. For example, there was one night I downed about a liter of Fireball plus nearly eight Canadian Clubs. I was extremely drunk, but I still remembered everything. And the next morning? Totally fine. No hangover, nothing.

Apparently my mum is the same way, so I guess it must be genetic. but I am curious how long the superpower would last for.