We put about 50,000 miles on a 2003 Montana 3295RK rear kitchen model and broke one dish. After that we learned to put a small piece of non-skid shelf liner between breakables, like measuring cups and mixing bowls. No problems with them. Our glasses are mostly acrylic except for four glass drinking glasses. Just use common sense and you should have no problem.
This is the rear cupboard over the peninsula. The light switch and shade are on the rear wall. There's a stack of three mixing bowls and three measuring cups on that lower shelf. So far they've survived almost four years of fulltiming, 3 1/2 of those in the rear kitchen.
Brad, I don't think the mor-ryde affects movement of contents when stopping. I feel for you with the broken corelle. We never broke one on the road but had one fall out of the cupboard when we opened the door once. It hit the edge of the counter and shattered into those millions of tiny bits. The vacuum went crazy sucking them up.