In 2022, I'd imagine there is some startup that does this. I'm not asking for something that truly scales to millions of users and has ALL the features of production reddit / hackernews. I'm thinking an MVP production app that has basic things that we all think about that a social networking app would have. I'm surprised that it's still so hard to find a "SaaS in a box" with some sample production apps like Twitter-clone/Reddit-clone, etc that does all the wiring for us.