Earlier quoted context omitted.
You know, I currently use my own domain for email. Maybe I am paranoid, but I worry about that when I die, my domain will expire, and then someone will register that domain and set up email accounts with it. They would be able to access so many services that I would have left open after my death. I still don't know how to handle this apart from leaving a fund to someone I trust to have my domain renewed for a few mor…
You don't even need to die for this to be an issue. Your registrar could just screw up and sell your domain to someone else. Or your registrar could have a security breach resulting in your domain being transferred. There's a myriad of ways the "own your domain" solution could fail, so it's really about which risks you're willing to take.
One of the reasons I am in the process of moving all of my domains to Gandi is because they appear to be the only reputable domain registrar that supports U2F. I take security extremely seriously when it comes to my domains.