Is there any reason today to use RSS over Atom? Atom sounds like it has all the advantages, except maybe compatibility with some old or stubborn clients?
A great summary why Atom is better [1].
Here's an oldie but a goodie regarding RSS vs Atom [2]
[1]: https://ittavern.com/difference-between-rss-and-atom/
[2]: http://www.intertwingly.net/wiki/pie/Rss20AndAtom10Compared
RSS itself provides no benefits over Atom. In fact, you're quite likely to see a bunch of RSS feeds that use elements from the Atom namespace.
You should just use Atom.
People still refer to all these as RSS, even if Atom is actually in use.