I'm having someone build me a "news site" and I need to understand something: Are there sites (like blogs) that only supply an Atom feed, and no RSS?
There are plenty of scripts that do RSS, but only some that do both RSS and Atom. If I could knew that I could always expect to find an RSS feed (or at least 95% of the time), it will help me make my decision on choosing the script.
I can understand that there may be less generator programs that handle both RSS and Atom, but why is that an issue? From the user side just about every aggregator/reader can read both formats. Just generate one one format or the other and you're covering most of the market.