I think this will be the case, part of the charm of early social media was everyone was authentically oversharing. That got people in trouble or they embarrassed themselves. That's why snapchat with automatically deleted posts got a foothold, there wasn't a permanent record of your embarrassing fuck ups.

That will not happen again, we won't be so collectively naive and any new social media will be taken over by PR + brand advertisers almost immediately. Just look at how threads started.