I mean, it's 2023. Web-based simple threaded conversation platforms should be absolutely trivial to develop/clone/deploy.

I'm not convinced building a Reddit is hard, at all.

But getting a mass adoption of users to make it worth using is.

Which is why I'm continually surprised some startup+VC combo doesn't just build it and then pay the top 1000 broad-to-niche influencers out there to sign up and start relentlessly hawking it on their various social medias.