IMO you don't experience email's failings until you setup an email server. Compared to any other network service I've setup, email is a huge PITA. Setting up the MTA with proper spf, dkim, IPs with a good reputation, and incoming encryption plus the MDA/Imap server with encryption and spam protection. It is a lot of work.

I've love to see something replace email with something that is simple to setup and administer.

As a user of email I don't really have a problem with it.