The hassle of hosting your own stuff is really not the relevant barrier. That's merely a technical problem, and it could be solved by plucky startups or open so

The hassle of hosting your own stuff is really not the relevant barrier. That's merely a technical problem, and it could be solved by plucky startups or open source projects (like FreedomBox). The real barrier is social. Nothing you do as an individual to host or encrypt your email, or IM, or social media presence, etc, is going to matter unless you can bring your friends and colleagues along with you.