I wish you were wrong. Unfortunately, you are about 83% right. The remaning 17% are about customer education: if there is no product available on the market, then nobody needs it. Majority of customers just do not want unexisting products. Sometimes, new products must be introduced to the public.

When Joe made some efforts in the past to introduce the new products, then probably the public was not ready yet: there was not many 2Gen Isuzus actively used for wheeling, and 2gen owners usually care more about the underbody protection and about the ride quality than 1gen owners. May be, now it would be a different story, regarding torsion bars and skid plates. But I can only tell about myself.