Spam was the main reason why I moved back from Fastmail to Gmail. Another reason was the lacking support for special characters, i.e., characters not found in standard English, for example in search. IMAP was great, however, I missed Gmail's way of filing sent mails with labels.
As a Gmail user, you are simply no longer used to daily spam messages, even if you use catch-all (via Google Apps).
In terms of privacy, Fastmail had no advantage over Gmail (via Google Apps) for me; both providers have servers in the US and are based in a Five Eyes country.
That does not of course not mean that Fastmail cannot be a great alternative for many users, it was simply not sufficiently better than Gmail for me. It is great to see that there is still a niche for a 'native' IMAP provider with some extras!
As a Gmail user, you are simply no longer used to daily spam messages, even if you use catch-all (via Google Apps).
In terms of privacy, Fastmail had no advantage over Gmail (via Google Apps) for me; both providers have servers in the US and are based in a Five Eyes country.
That does not of course not mean that Fastmail cannot be a great alternative for many users, it was simply not sufficiently better than Gmail for me. It is great to see that there is still a niche for a 'native' IMAP provider with some extras!