I think this is a money making racket.
Imagine a brand new helmet in a box that has never been used
but now it fall outside the rules?.
I'm not talking something made in the 90s!!!!!!.
Mike, you of all people should know that resins and epoxy have a service life. Over time they deteriorate, craze, crack, dry and become brittle. That shell doesn't get harder over time, it gets brittle over time.
I would be more concerned with buying a helmet in a year of El Nino after two years of poor salt conditions and a conversation heard a PRI where the idea was floated of cancelling salt activities this year in favor of pumping salt back to the north side of I80 ... and expecting to use a new helmet this year.
I would wait until the last minute on making that investment...which is what I did last year. (I did get to use mine though, just not at the salt)