My point was that running your own server isn't about just getting Hello World working, its about the fact that you basically are now living in a world where you will potentially have delivery failures of your email, or incidental things you need to fix at random. Imagine if this is how your phone worked: on a given day, you may find yourself suddenly having to learn about why your phone calls stopped going through, or in general, 0.01% of the time people can't reach you with no explainable reason. The idea I could wake up on a random Tuesday and find myself debugging ancient erlang code to diagnose my phone calls regressing feels no less disastrous than having to read the source code to my email server if/when it mysteriously stops working.

In any case, this is a argument as to why it's an uphill battle to convince people that running your own server is an easy endeavor. (Which seemed to be the point of this post.) It says nothing about switching off of gmail to another provider as you did, or if the actual burden of running a server is worth the privacy trade-off for an individual (i'd argue for most it isn't, but wasn't really the point i was trying to make.)

Switching from Google to another 3rd party provider doesn't eliminate privacy risk, it shifts around the probability distribution for certain kinds of events to occur. (Arguably, so does hosting your own server, but hosting your own server does rule out large classes of failures.)