I forgot collecting and plopping down huge barrels from magic pockets.
They are called a Bag of Holding in D&D and even that rare and powerful magic item doesn't make it possible to use potions from someone else's inventory, or the entire party using the same Greatsword +1 to attack while also using a shield during enemy turns.
Oh god I keep forgetting those things exist. It always makes me depressed when I consider the fact that those are actual things in BG3 -_-