I don’t think this is necessarily what is happening.

Roblox predates Fortnite by a decade and is only getting more popular over time

> I don’t think this is necessarily what is happening.

This is exactly what happened with my niece, my nephew, and all of their friends.

Which isn't to say they've outgrown all of the games they played when they were younger. They still play minecraft, stardew valley, kirby, mario, etc. I don't know why, but they all bounced off of Fortnite after they hit a certain age. I wonder why.

Tbf, "just make the next Roblox" is kind of an insane business proposition. Roblox has enjoyed unprecedented success at engaging the same age range for 20 years. Most games that are anywhere near that old have for the most part followed their playerbase as they aged. Runescape is a great example, where enough of their playerbase in 2013 were the same people who were playing 2007 that they demanded a reversion.

Roblox, in contrast, has been extremely popular with 7-16 year olds for 20 years. They're funneling in new players faster than old players age out. It's pretty wild.

My personal theory is that Roblox largely stepped into the amateur game dev hole that Flash left.