This is an interesting subject, but I see it a bit differently.
Delamination is usually due to lack of maintenance or manufacturer's defect (probably more-so this). I don't think I've ever seen a fiberglass/composite RV more than a few years old without some level of warping or delam. That being said, your EPDM rubber roof failure can also be attributed to lack of maintenance or defect, yet we've read numerous accounts on this forum alone where folks have had their roof replaced by insurance. In my mind, there's not much difference.