And, of course, in group chat, your different friend groups never interact. One of the coolest thing about Facebook in its heyday was when two of your friends who didn't know each other had a cool conversation on your wall and then became friends themselves.
Unfortunately there really doesn't seem to be a proper replacement -- BlueSky and Mastodon are replacements for Twitter, not Facebook. Group chats aren't as good, but they're the closest thing going.
if i see a photo that a friend broadcasts out once on a social feed, i see it and move on.
if a friend puts a photo in a text/group chat, i know that it's something they wanted to share with me
Instead of friend graphs (mutual) or follower graphs (directed edges), they had Circles.
Circles sound a lot like group chats.
I guess "social circles" may be a better way to model social relationships than follower graphs.
For me personally, this is a feature not a bug. I want things I see to be things that somebody wrote just for that channel. It's why I use group chat over social media.
I'd like to see the usage history of that feature. I bet my bottom dollar it's decreased over time.