Permanently attached tent ends when did this happen

What year or when did Hybrid manufactures start having the tent end permanently attached to the bunk ends? We out looking and noticed that a 2014 had the end permanently attached to the bunk ends. I thought this was a great design. No more Velcroing the bottom of the tent to the bunk ends. Seemed an improvement in Hybrid design and Hybrid setup. Just drop the end drop and drop the mattress down.