Yep, in process. Floor insulation is definitely forthcoming.
For real, yeah mobile home manufacturers must have incredibly small scrap piles. My wife and I had a doublewide on a private lake lot in Michigan a few years ago. I was doing some remodeling in the master bedroom closet. It was nothing to find studs spliced together with 3 seperate pieces. The grand-prize winner was a stud that was put together with 6 seperate pieces! They didn't use the metal spike things to splice them, they were cut with matching grooves, then glued together. Some of the pieces in my prize-winning stud were as short as 3-4". It was straight and strong though!
Here's a pic I found online that shows a typical wall stud in a manufactured home: