Gavin, I have a mandolin that has SS frets in it. I really don't see the string windings being cut more by the SS frets than regular frets have done. They do seem to be holding up better than regular frets, but I have not had the mandolin long enough to speak on that from experience yet. I suspect they will last much longer though. I hope the guy who installed them will speak up on this subject, as I am quite interested. I won't drag him into this by naming him though.
A wrong note played timidly is a wrong note. A wrong note played with authority is an interpretation.