2100%

yeah so my new arbitrary category uses the following ruleset:
Beat the game while achieving 85% item collection without collecting any unnecessary upgrades. Upgrades are defined as any item that has a non-quantitative effect on Samus outside of the pause menu.

this definition would ban:
space jump, for giving samus the ability to jump in midair
charge beam, for giving samus the ability to charge the power beam and use charge combos
varia, for removing text from the players hud
boost, for giving samus the ability to boost
thermal, for giving samus the thermal visor
spider ball, for giving samus the ability to ride the rails,
gravity, for changing the water physics
and grapple, for giving you the ability to ride the grapple points

and with those restrictions, the additional items that you cannot collect are:
biohazard containment missile, because you don't have charge beam
main plaza missile, because charge beam
shorelines spider ball missile, because charge beam
research lab hydra, because charge beam
cargo freight lift to deck gamma tank, because gravity or sj
and mqb because charge beam
useless items like the charge combos don't count as upgrades because they don't do anything