Comment by mindslight

Also, email reputation and deliverability only applies to sending email. While many of the advantages of self hosting only require receiving email - eg better control over your root of trust for account auth, different address per account to avoid your email address being used as a join key for cross-company surveillance, etc. Self hosting doesn't need to be an "all or nothing" affair. Set up your domain with whatever server setup you think you'd like and start switching account identities over to that. Then only after you've gotten comfortable running it and tested deliverability, start switching over your personal correspondence.