Two years ago, I announced the future replacement of rss-atom-bundle in favor of FeedIoBundle. The goal was to get a cleaner code based on feed-io and new features like an user interface to handle feeds, without causing any trouble for rss-atom-bundle's users. The result was not what I expected : forms made FeedIoBundle much harder to maintain than rss-atom-bundle and almost nobody adopted FeedIoBundle. Besides, rss-atom-bundle's community is still growing, with some of these people opening new issues and even sometimes submitting pull requests. As a consequence, I drop FeedIoBundle in order to focus on rss-atom-bundle and feed-io.
This isn't a problem for me to take this kind of decision. I tried something that didn't work and now it's just time to put an end to it. No matter how much time I spent on programming FeedIoBundle, it was worth the effort as I grabbed some knowledge thanks to this project.
So now the package will be tagged as "abandoned" on Packagist and all users are encouraged to use feed-io or rss-atom-bundle.
Edit : I managed to remove FeedIoBundle from Packagist, you can't require it in your project anymore.