What does 5e do better than any other system?
I struggle to see what 5e does that another system doesn't do better. I don't hate 5e (I even still play it, largely because a group of friends invited me to join their game), but ever since I started branching out to other systems a few years ago, I can't help but feel that no matter what aspect of 5e you like, there's a system that does that better that you could play instead.
If you're really into the tactical side of things there's systems like Pathfinder, Mythras, or even DnD 4e.
If you want a narrativist game heavily focused on story you could play Fate or any Powered by the Apocalypse game.
If you want to focus on dungeon crawling there's systems like Knave or Shadowdark.
If you want over-the-top powerful superhero fantasy there's games like Exalted.
The big reason I see for why people play 5e is because it's am easy to get into, beginner friendly game, but it's not really that either. 5e is not a low crunch game. It's not the most complicated game out there, but it's not a simple one either. Games like the aforementioned Knave or Shadowdark have much easier to understand rules for new players, and especially new TTRPG players.
I'd like to hear from people who have actively chosen to play 52 over other systems (so not people who have only played 5e or who want to play other systems but haven't found games) what merits they think 5e has over other games
Edit: It seems a lot of people are misunderstanding the question. People seem to be answering as if I asked "Why is 5e popular?" I'm aware of why 5e is popular and that's not what I'm asking here. What I'm asking is what does 5e do from a systemic standpoint that no other system does better?