I hope my question is not very stupid, anyway, i have always curios about the design philosophy of Western tanks such as Leopard, M1, Challenger versus Russian tank such as T80, T-90.
Vs
1- Why do Western tank mostly use NERA instead of ERA? Isn't ERA more effective than NERA, especially against KE and they are also much lighter and replaceable ?
2- Why don't Western tank mostly have active hard kill protection? I know there are some recent plans to integrate Trophy on M1A3 but why is it so late? On one hand, even ancient Russian tank have acti