I have been using Bloglines since 2006 but realized that I had gotten very carried away with what feeds to follow. I committed to delete all my feeds and start fresh today.

I did not see an obvious way of making a backup with the beta interface and logged in using the classic interface to use the "Export Subscriptions" feature.

The deed is done: 0 updated feeds.

And now, back to the beta site to start anew.