Originally posted by DaWolv:

Right now it uses both a weight system and a slot system with stacks.
Either way is fine, but both at the same time are just dumb in my opinion.

It's a rudimentary way to simulate the limitation of both quantity and weight of items. The weight limit is there so people aren't sprinting around with 30 stacks of stone, wood or metal. The slot limit is there so they aren't running around with 350 weight worth of low weight/low stack size items, as it presents a magnified unrealistic volume of carry capacity.

If player inventory is too lenient in either capacity, then it reduces the relevance of stationary forms of storage.