[Steer]

Would the future then not hold social media that were invite-only in some way?

[seanp2k2]

https://www.google.com/amp/s/www.theverge.com/platform/amp/2...

[gasof]

It's already there, it's called "an email server".

[lostlogin]

It's the 'reply all' button that ruined email. The other problems are solved by adequate filtering.