I'm surprised there's not more discussion here and in general about symmetric- vs. asymmetric-relationship networks. Facebook worked in the beginning because relationships were symmetric and there was no concept of getting "follows" -- friendships are modeled after real life ones, where the friendship is between two people.

I can see why the big networks moved away from that: pushing "content" has a lot more friction when relationships are symmetrical. What I don't understand is why there is no upstart trying to bring that back.

What does that mean exactly, how do you see that manifesting itself? Would we even be aware of these networks, sounds like email

Not email; social networking. Symmetrical just means the relationship is the same from both sides. Imagine a two-way "friendship" relationship (old-school Facebook) vs. a one-way "following" relationship (more recent Facebook, Insta, Twitter, etc.).

A followers graph is much more stable. You can have 1m followers but you can't have 1m friends

The friendship link on the site would need to go both ways. Request and accept. There is no concept of “Follow”.

In addition, I’d say limit the number of “friends” a person can have. Maybe cap it at 200 (Dunbar's number plus a little extra). This eliminates celebrity, news, and meme accounts. It also eliminates people playing the silly game of seeing who can get the most followers or bragging about follower counts.

These are your actual friends, who also consider you a friend. Even if a celebrity were to join, the site would be useful for sharing with actual friends, not their fans or casual acquaintances.

Facebook started out similarly, but I don’t think it ever had a friend cap. I remember some sorority girls try to get me to make a Facebook account around 2004/5, because they had a contest to see who could get the most friends. I thought this was stupid and said no. Since this happened almost instantly after launch, I think those friend limits are important to make people use it for actual friends and not a popularity contest. Facebook went the opposite way, leaned into it, and created the Follow option. It was all downhill from there.