I can only speak for myself. I would love to have a model kit of every big rig truck subject going back to1890. But all my posts on all the treads on this and other web sites are coming from an economics point of view. I know from a practical standpoint that truck modeling is a very, very small portion of the overall scale model kit business. Military and Aircraft modelers are by far the largest portion of scale model builders. The obsession with war is rampant. Car modeling goes without saying is a very large market. Look at the shelves at a major hobby shop and compare the shelf space set aside for big rig kits. Further more the United States is not the largest model market in the world. Asia as a whole, is the largest modeling market. Japan being the largest single market. Europe is number two for modeling sales. The kit manufactures are only going to allocate a small portion of their capital budget to a big rig truck kit. The market is extremely small for such a subject. Not to mention, as Dave Metzner said in one of his post, a big rig model is particularly expensive to produce. A big rig kit has more parts than a aircraft or a boat kit. This is especially true if the big rig kit has a detailed drive train, something that if the kit doesn't have, the casual big rig builder will bitch and moan about, All this being said, a new big rig kit that is put on the shelves once every 15 or more years on average has to be a hit. One failure or slow seller means that the next big rig model may not be produced at all. All of these points have been said ad nauseum by others. It makes practical sense to offer current modern truck subjects. They would be the common medium for the casual truck modeler and the hard core big rig modeler. And in 15 years, they will become the vintage subjects available for future generations.