I have exactly the same problem ... when in combat, I forget most of what's in my inventory. I have 7X more potions, elixirs, coatings, and spare scrolls than I have spell slots. That seems a little excessive, and it kind of marginalizes the character class abilities.
In the old D&D modules they used to have tournament character sheets. Here is one such very high level character from the Descent Into The Depths of the Earth module, which seems appropriate to compare to BG3: Darg Blonke, Gray Elf Fighter/Maigc-Uer, levels 7/11, sword +2, spear +1, chainmail +2, shield +2, ring spell turning, stone controlling earth elementals, potion flying, potion gaseous form, potion invisibility, three potions extra healing, five oil flasks, two holy waters. That's it!
If I tried to list everything in my BG3 level 5 character's inventory right now, it would go off the screen. I've become a new type of D&D subclass, the Hoarder. The Hoarder picks up anything with potential magical value. The Hoarder deludes itself into believing that such items might be useful later in the game, but in practice, neither consumes nor sells such items. The Hoarder eventually succumbs to severe encumbrance.
