Cost and time are the main reasons for no frame. You can easily build a one story building this way, with let-in 1x braces. Can a person make mini shear walls at the corners with the 1x bracing all the way up to the plate. I have not heard of the larson trusses. There are problems with using plywood for shear too. First, if applied on the inside of the outer wall, you block off the stud bays to be filled. This wall system is supposed to breathe. If you apply it to the outside, what does the plaster attach to? many questions??