I would like to suggest, that when we use resources and the storage has K in it, the reduction is visible immediately. At the moment, when for instance I am upgrading an Oil Reservoir, it takes a long time till i see how much i have left. I could look at the cost of the upgrade, and calculate it, but this a game not a math test!
Especially in info age, where everything is so expensive, it would save a lot of time.
If the storage has no K in it, it can go to the correct amount immediately too, as far as I am concerned.