These mainstream services no longer provide what people signed up for: life updates, pictures of kids and dogs, etc. These value-add posts are becoming less frequent because of/and are being replaced by streams of posts from people _you should follow_ or content they're pretty sure will rile you up about ... whatever. Generally, the people who are still active and whose posts slip through (because it's their only outlet) are effectively monkeys slinging shit (e.g. uncles posting AI slop memes about Barack Obama's suits).
It seems like younger generations have moved on to more silo'd experiences. I don't use TikTok but it's my understanding that it's more about connecting with people who share common interests (more akin to HN or Reddit) and not as much about connecting with your high school Spanish teacher who has gone full MAGA and whose posts you don't care to see and/or who you don't want seeing your posts and trolling you in the comments. This same cohort also seems to be spending much more time in private group chats and, for the most part, the platform doesn't seem to matter; it's just a message broker.
