Emacs with Wanderlust and GMail

Not that I use it every day, since my Gmail is not my main e-mail address, but what's wrong with using Gnus + Gmail?

This kind of answers my question, but I don't think it's relevant when you have Gmail (or use any other IMAP):

http://jfm3-repl.blogspot.com/2007/10/emacs-tricks-7-do-not-...