I think it is true that during the war the german industrie made to many types of tanks and AFV. On the other hand it was the freedom that the industrie had in developing that gave Germany some outstandig high quality and innovative weapon systems.
I recently thought back to this old post, something I've mentioned a few times over the years, and it occurred to me that I may have erred in thinking that the Ursus factory (taken over by the German firm FAMO) could easily have been adapted to manufacturing Panzer IIIs or IVs. The only tanks it seems to have produced were variations of the Vickers 6-tonner, mainly the 7TP; Ursus mostly built trucks, tractors, and similar vehicles for both military and civilian use. Restarting Panzer II production may have seemed the best way to make use of a limited facility. As it turned out, the new line was mainly of value for producing self-propelled guns like the Marder or Wespe.