So here’s the thing. There are absolutely many “tech” imbalances in the game, usually around where a new tech is introduced (HEAT-FS vs armour-based vehicles), and while it’s easy shorthand to talk about this in a “year” sense (WWII vs Cold War), the problem is that years are ultimately irrelevant to balance, and by framing the problems this way it’s essentially shooting your own argument in the foot, and invites out-of-hand dismissals.
Just for historical purposes !!! BR rating is nothing in front era ; i.e. WW2 in front of modern vehicles at same level…