Well, I don't know about the consensus, but in my experience, most
floppies go bad from wear and/or breakdown in the binder. It's
sometimes possible to "renew" a bad disk for use by either AC degaussing
or use of a strong DC field, but given the cost of the media, it's
scarcely worth the trouble.
After all, it's just rust spread on a cookie. ;)
--Chuck