Is there any situation in the game that actually requires supplies to be placed on the ground? What use does it serve?
Generally the players are taking supply from 1 location to another, placing them in storage areas.
Can it just be disabled, or at least a server variable to enable, or disable this?

I do not understand the need for supplies to be placed on the floor, what purpose does it serve?
Supply duping is the bane of our lives, hosting 2 very popular vanilla servers and need to be addressed urgently as it's an exploit which provides imbalance within the game.
This and supply lag from server uptime, really need to be addressed to this amazing game.