99.99% don’t really want or understand a federated system. How do you know it’s not hosted on someone’s desktop over DSL? How do you know it will be there tomorrow? How do you know they aren’t modifying the code to do something nefarious?
As long as there’s a “main” instance people will prioritize that.
In general, trying to get my kids to actually do something. Sometimes I go out and eat tacos.