As IndieHackers continue to grow, an increasing number of skilled marketers will join the platform. Maintaining the original quality will become challenging, and I often feel that it's unavoidable for IndieHackers to evolve into something different.
Sorry for the late response, hopefully you see this. I know ycombinator isn't the exact same thing but it is cool how ycombinator has managed to not have this occur. I think the moderation and scoring/voting system that they have created might be what has enabled it to last so long.