I always thought the opposite. The HYBRID beds fold down from the outside and does not take up any room whatsoever inside the trailer. My POPUP is completely full when tore down for travel. You cannot stick a hand inside the front door. You can pull over with a hybrid and sleep on the couch or convert the bench table to a bed as well and not fold down the two bed ends if you like. Big difference between the two units.
My 12-foot POPUP box does not allow much moving around room inside our trailer when setup but it is perfect for the two of us. This makes us live more outside the POPUP in just about every thing we do. We have all of the modern conveniences in our POPUP and do not have the high expenses associated in having one of those hugh big trailers.
My biggest expense is maybe two tires in a three years time.
Its all what you want to do I reckon.
We are more what you call campers where most of those hugh RV trailer guys are RV travelers more than they are campers in my opinion. They can carry their whole household with them going from point A to point B. It is almost like two different lifestyles...
Being avid tent campers from the 60s and 70s sort of moved us into the OFF-ROAD style of camping that our RT Popup trailer provides us. My off-road POPUP camper will go anywhere my 4WD truck will pull it.
This is what turns us on...

My OFF-ROAD 12-foot BOX plus 5-foot front deck weighs in at 4200lbs loaded down with supplies etc... With the front deck an my truck bed I can carry some serious supplies on our trips...
Roy Ken