I don't believe I'll even "last" that long, in terms of regularly playing games.
It's just the way it is.
As I get older, the time I spend gaming has greatly reduced. I simply don't have the patience to play most days (I arrive home tired, and in no mood to do anything).
My favourite genre was always long, immersive, RPGs. I'm the kind of guy that easily spent 100+ hours on an RPG.
Now? I play arcade games (shmups, beat'em ups, ...), short games that take 4-6 hours to beat, or "episodic" games, in the sense of games that are separated in chapters/missions, and that barely have any story (like HITMAN 2).
I find myself drawn to simple, "pick up and play" gameplay (like older arcade games, or digital pinball tables), and less to many of the big games currently getting released.
For example, I would go bananas if those Darius compilations were released on PC. On the opposite side, I couldn't care less about battle royale games like Battleground/Fortnite/Overwatch, things like Dota 2, Monster Hunter, or even Half-Life: Alyx.