>unless you are going to roll your own emergency power, multiple redundant HVAC, and fire supression, as well as shell out hundreds of dollars a month for significant upload bandwidth to your house or apartment, your data and encryption keys are still in the physical possession of a corporate datacenter.

You don't need significant upload bandwidth for email. Or download bandwidth either. (Unless you're expecting constant DDOS attacks.) Or emergency services. The HVAC might be a good idea.

You could have made your point a lot better by just saying that 99.9% of users will never set up a home server to do email. Which is the truth.