I think plenty of people have time to implement a good IMAP client, just not me because I have a job that is completely unrelated to writing mail clients.
two developers, 5 years, not yet feature complete - but it's the closest thing to someone attempting to write a really good IMAP client based on the RFCs, and they've been active in mailing lists and IRC too.
Funny how nobody has actually built this mythical IMAP client you say is so easy.
