For events specifically, my cohort (somewhere between Gen-Z and Millenial) have moved event organizing entirely to Partiful, which I've found to be far superior to Facebook Events. Doesn't help with group posts though.
Any idea what the business model is?
It seems like they might have group organizing features now, but I'd be concerned about adopting it for a group without a clear idea of how they're going to make money
I can throw my site Partey.io into the mix. Works without VC backing for free (I run it and it’s cheap for me). No need to expose your phone number, an invite is just a link you can share.
I’ll second Partiful.
Their use of good old fashioned www links and SMS messages makes it easy for everyone to share and join events. No app and no Partiful account necessary.
They also have simple and good event privacy model, group scheduling, reminders, Venmo based ticket system, and group chat.
It’s taken over almost completely in my social circles and I’m all for it.