To add to those points, one day you (the person with self-hosted email) would die and your family will be left without emails sometime soon and no way to get th

To add to those points, one day you (the person with self-hosted email) would die and your family will be left without emails sometime soon and no way to get their widely used addresses back. Choosing a medium or large third party provider means you just need to document “go to <this site> and manage payments to pay <this much> <this often> to retain your address; this is how you contact customer support in case something isn’t working”.