Looks like we've gone full circle. I clearly remember how shotgunners rejoiced, when plastic shotshells came on the scene, in the early 1960's. No more worries about damp shotshells swelling to the point where extraction was nearly impossible. Then, shotgunners sometimes had to resort to driving them out with a stick from the muzzle end. Not a reassuring task, with live rounds.
If memory serves, Remington was among the first, if not first to introduce plastic shotshell hulls. That was in 1960. Now here we are, better than half a century later, back where we came from. I suspect these "new and improved" shotshells will be non-reloadable, too. Unless that pie crimp is cut off and the shell roll crimped, like before. If possible.
I can't see these things gaining any widespread acceptance among sport shooters.
Al
ps: Though paper hulls can be pie crimped...in my experience the crimps don't hold well after the first firing. Usually not lasting past one or two reloads, at most.