Reddit had so many users that hyper specialisation was possible.

There was a subreddit for every tv show. And people are coming here expecting the same. I think we’ll see similar content but a bit less niche.

For instance instead of a community for every tv show it might be better to just post about any tv show in /c/television

I used to follow /r/pizza but I’ve seen tons of home made pizza photos in /c/foodporn

For most niche topics you can probably think of a more general community which will help drive content and critical mass.