I beg to differ : the technical use of armored cars was quite sophistictated enough at this point in German army, and spoused tactically (strategically...). Communication, autonomisation of arms, etc. was present, and not in French army where you really had a stagnation in technical, tactical and operatical levels.
You seemingly did not quite get what I was saying. By 1940 only the German army had a system which properly accommodated the new factors of the mechanized warfare.
The French tried to come with something on ad hoc basis when it was too late.
The Brits (AFAIK) did not have anything adequate as well and kept having problems with a proper coordination of the armor, artillery, infantry and aviation well into 1941.
The Poles, the Dutch, the Belgians - nothing worth mentioning.
Italy probably the same because in Africa it was routinely beaten by the Brits.
Japan AFAIK did not built a modern mechanized force during WWII putting the main effort into the naval developments.
The SU
seemingly was addressing these new trends (and even the experience of 1939 - 40) but, as summer of 1941 demonstrated, their system did not work either and soon after the German attack they lost most of their existing mechanized units. Organization of their tank armies (and smaller units) of the 1943 - 45 was heavily based upon the experience (their and German) of the 1941 - 42.
The US started building a modern army only after entering the war in December of 1941.
So, as I said, there is no reason to say that the French circa 1940 were the only ones who "did not get it".