Authentic RSC requires your wielded items to be part of your inventory. RSC Cabbage bypasses this, by creating a second tab on the 'inventory' menu.
It's now a 'split tab' (like magic/prayer) but the worn items end up in a separate interface:
This obviously helps in a lot of places: you can carry more resources (food/potions), haul more loot, etc. Equipable items with right-click options, such as Charged Dragonstone Amulets and enchanted rings, can be operated while being worn.
The bank interface also lets you load items directly into the worn equipment slots (toggle inventory / equipment with the items at bottom left of the back interface) and even lets equipment setups be part of your bank presets.