Also negatives being that many makers use hollow core aluminum tubing where cabinet can fall off the wall because the screws don't have good anchors. Some have used wood core aluminum tubing to keep that from happening.
Northwood and Outdoors RV use wood in the frame so the screws for cabinet, etc have something to bite in to.
Not sure about all the sciency stuff but I love our Crossroads Zinger.
I’ve watched the brand over the years and they seem to hold up pretty well. Ours is brand new and knock on wood, no issues except a broken ACME nut I found yesterday and some nuzmbskull installed the door latch backwards.