It is interesting to note that while the tip of the German spear was very high tech with such things as Tiger tanks, its long shaft, however, was way out of date, the typical German division dependent on tens of thousands of horses for transportation little different from WWI. The allies on the other hand, except for a few specialized mountain unites, were fully mechanized.
Indeed, Hitler was always trying to fight the war on the cheap and biting off more than he could chew — not enough naval resources to invade England, being way overextended in Russia and failing to support (Jewish) atom research.
I laugh when I hear silly talk that had the Normandy invasion initially faltered the allies might have lost the war. Nonsense. By 1944, in a war which was basically a war of production capability, America was king in that department. Moreover Russia was grinding up the German army just as Allied air power was tuning German cities and industries to rubble. By late 1945 Germany would be starving to boot. And never mind that the US had the atomic bomb as its ace in the hole.