For $1000 and $30 a month, anybody in the world could hire someone to setup and maintain a personal email server.

Of course being user owned, by definition users should be allowed to outsource their email service to large companies, and they do, because it's a lot cheaper that way.

But an email server they own themselves, with their own rules, own display preferences, compatible with billions of other email accounts, is well within their reach. And millions of people do just that.