alt Hacker News15 years is a humongous gap. Almost an entire generation. Do you expect to make a Facebook killer in 2022? A WOW killer in 2017? Make a DOTA killer right now?
There's so many people who aren't even your market, they are an "one game player". You can't target that realistically unless that one game shits the bed.
Tik Tok is arguably a Facebook killer.
Roblox is in some ways there, I think Epic thought fortnite could have competed. IMO they made a strategic mistake in shackling their game-as-a-platform to Fortnite. I thought the music fortnite thing looked interesting, but I have negative interest in installing Fortnite.
Call it something else and make it literally the first thing you see on epicgames.com, have it work on mobile, and maybe things would be different today.
(Aside: Roblox wins because I can go from typing in roblox.com into my browser and be playing a game with a friend in under 20s)