In real life, there is also not such an fast air support....
....not an argument so far. The maps arent show the hole war, where I could understand supply issues maybe. The maps are showing a clash of 2 prepared armies. Otherwise we should call in units in the future, which have morale penalties, caused of bombed cities, with half-destroyed tanks, cause of an earlier battle.....
Supplies were irrelevant before patch. Now they are relevant. You need to worry about them.
It's about authenticity: Planes may not be so immediate to respond (except if they're flying nearby) or flying that low, but they're an important part of the battlefield.
Supplies weren't, now they are.
I was countering his bad argument about supplies being "everywhere" in reality.