LOL I'm doing this right now in BG3. I think Shadowheart is trucking around with about 400 potions of every thing conceivable. And Gale has a bag of a thousand scrolls.
Don't forget every magical staff , necklace, and ring that casts a spell.
Will I ever use Create Water from the Rain Dancer? Probably not, especially with Shadowheart lugging around more than a dozen bottles of water. But what if I really need it?
Same, I also have a backpack for unique but non magical/useful items; dead fairy, mithral moulds, some armor I found in the mindflayer morgue. I definitely have a in game hoarding problem.
Glad I'm not the only one whose Gale has a dragon hoard of scrolls. No matter that half the party and Tav has dark sight, I might need that dark sight scroll!!