Not exactly. They removed the feature but left the data behind. I assume they did this on purpose so it could be salvaged by the user if needed. I suspect Apple

Not exactly. They removed the feature but left the data behind. I assume they did this on purpose so it could be salvaged by the user if needed. I suspect Apple Support could have helped or perhaps third party RSS readers could look for the data and automatically import it. The only thing they could have done differently is to maybe do a runounce in Mail that tells the user RSS is gone, point them to a support KB article, and maybe point the user to the Mac App Store to search for RSS readers.