RSS has been damaged by in-fighting among those who advocate for it (2006)(smashcompany.com)
smashcompany.com
RSS has been damaged by in-fighting among those who advocate for it (2006)
http://www.smashcompany.com/technology/rss-has-been-damaged-by-in-fighting-among-those-who-advocate-for-it
Atom fixes these and I don't see many people fighting about it. Support for both RSS 2 and Atom are widespread.
TL:DR if you are publishing use Atom (if you already publish with RSS 2 it probably isn't worth switching), if you are consuming support Atom, RSS 2 and best effort support for whatever else.
I have a blog post in draft about vest practices for publishing a feed but really there isn't much trouble here. Really the biggest "problem" is that the fact that it is the term "RSS Feed" makes newcomers not realize that Atom is a well supported format and the recommended one.