Depends on your definition of “more” and also who you are as a user. Just for arguments’ sake, I could argue that Fastmail’s privacy stance and policy don’t ma

Depends on your definition of “more” and also who you are as a user. Just for arguments’ sake, I could argue that Fastmail’s privacy stance and policy don’t matter much compared to Posteo because of what’s written on their websites as well as which jurisdictions these are located in, and hence Posteo is better for privacy. I could also argue that for non-technical people, having a custom domain and managing it is a pain, compared to just choosing some domain from a list of predefined domains in a drop down and not having to worry about domain renewals, MX records, etc. I’m not saying that custom domains are bad (they do allow you to switch to another provider easily), but there are trade offs to consider in both cases, and hence what may be “more” for one may be “less” for another. Also consider the price difference when multiple mailboxes are required. Fastmail becomes quite expensive very soon compared to the others.