I appreciate the hard work. Nevertheless, IMHO it would be better if open source projects will bring original ideas to the market, instead of copying an existing product.
Post? You optimist you. If anything we're smack in the middle of it.
The Dovecot devs shouldn't have made Dovecot when we already had UW IMAP. Postfix is redundant, we've had Sendmail for decades.
They all should really have done something original instead.