Why the sarcy comment?
It was a collapsible gate at a fixed point to work on the two deck models and now they have a design that will perform a function that is common in many conventional stock trailers. The engineering and design is on a different level
Probably just because of the dividing gate bit being the headline point of the post I should think.
As You say it's just a common function on most trailers and has been for many years now so not really a major selling point worth shouting about.
You'd have gotten away with it if you had just said pics of best super duper trailer on the market.........ever