I did it, and it's less pain than you think as long as you have a year or two to do it. Try fastmail and just start replying to all emails from your personal domain.
I use a dot io domain name for one of my email addresses, but I've always been slightly worried about the possibility of my domain registrar being socially engineered. If someone gets into my domain account, that could lead to ATO and change of the MX records. Should I be concerned? Is there a "best practices" dot io domain registrar that won't allow this to happen?
Might also be worth using a very long (1 week - 1 month?) TTL for your DNS MX records. This is no guarantee but it should buy you some extra time over the default which could be only an hour or so.
