I feel like most successful social networks tend to have grown a bit like that tbh.
You get the super techy early adopters, then you get the tech enthusiasts, then you get the regular tech literate and finally the network effect is strong enough to get everyone else remotely interested to sign up.
I'd say that also probably correlates to an inverted progression of people willing to put up with bugs, missing functionality and perhaps a bit more of a wild west as people figure out how they're going to interact with the network and the people on it.
The demographics of Reddit from 15 years ago were nothing like on Reddit 5 years ago and those are nothing like that which make up Reddit today.