Is a "Cast Hull" better?

Draschel:  But this isn't the way things worked in world war I and II. It may certainly be the case now, but  'now'  doesn't involve situations of total war, rather small scale conflicts and proxy incursions. In small scale conflicts, what you want is complete, swift and decisive armed superiority with all available advantages and advancements, to carry you through with minimal casualty for the public and media to portray. In addition, small scale conflicts are generally prompted against parties, without advanced technological means and equipment to conduct sensible warfare to begin with. This leads to protracted guerilla warfare in many cases, which armed forces and newer technological advances can struggle with because that isn't their fundamental design. They are also too, rigidly held accountable to rules, while simply guerillas aren't. But in total war? Producing 7  T-34 and M4 medium tanks is superior to producing 1  M26 Pershing or IS or King Tiger. Sure, at 1,500m anyone 1 of those can destroy the 7 in advantageous position, but this isn't always the way warfare follows through and what armies need. Armies need equipment for infantry support, for conducting breaches, for garrison defenses. 1 tank can be 1 place, but you can place 7 tanks in varied locations, OR have them acting all in unison. Can a brand new state of the art exhibitory export Challenger 2E trialed for middle east countries, demolish T-72s made 40 years ago? Yes it can, and will, in droves. But these T72 can be very easily upgraded with atmospheric environmental range sensors, defensive laser warning receiver, defensive outer reactive block armor, thermal and CCTV sights, laser range finder and ballistic computer, data management and communication suite, and modern Russian/Serbian ammunition to basically change into a dangerous opponent. Especially if there are hundreds. To upgrade a tank with these components, off an existing frame, is drastically cheaper than building a new Challenger 2E model. In addition, these vehicles are also lighter making them less of logistics nightmare. A brand new T14 or T15 Armata, can easily destroy new Abrams Sep 2,3,4 models in service but based off of 1979 design. But what good is that if a handful of what Russia has, like 2 dozen meet thousands of reasonably fit Abrams? Conflicts, well technology and advancements seem to pay off. But in terms of conducting large scale warfare, quantity with at least moderate ability seems so much more useful, deployable. What would happen with a total war scenario? Well we do not know, because we haven't had them since....I am not sure if we would label Korea or Vietnam or Iran-Iraq conflict as wars, but its the closest we have had since WWII.