Mile High, are you an engineer...probably not. The stacked box frame used by the old Carriage, now Lifestyle and DRV is far stronger than the cheap Lippert I-beam frame. The rectangular sections are more resistant to bending than a simple I-beam.
Rectangular box section material cost more to begin with and then you stack and weld them which adds more cost.
The big manufacturers are run by bookkeepers that keep the bottom line numbers as high as possible. This means they keep production up and cost down by using lesser quality materials.
I just do not like seeing big corporations dupping the public by trying to live off the success of a successful name. You can slap all of the lipstick you want to on a pig, but you still have a pig.
I looked at a NEW Carriage, it is not the same as a previous Carriage. If you want the higher quality of the previous Carriage, look at the Lifestyle line .
Ken