“The difference between The Germany of 1939/40 and 1942 Germany was quite large.” Yes, but it is also true for Germany opponents, especially Russia. In 1941 the core of the Red Army tanks was the KV1, BT-7, T26, T60, beginning of 1942, T70, T34, KV2. And the Red Army had defeat the German in Moscow. The English will do it in the desert. All of them learnt fast, except the Germans (slower because they were winning, so they didn’t see the reason to change tactic).