[ForRealsies]

Agreed. Physical privacy (gated communities, SFH's) have long been a higher class privilege. If you're elite enough you can buy part of a Hawaiian island.

[yojo]

A large part - 97% per https://en.m.wikipedia.org/wiki/Lanai

[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.