Hand-selecting each and every single gear piece in a long procession of unequipped gear pieces is a drudgery at best. It tends to follow that the majority of competitive players pursue the elite gear pieces over the other rarities, and elite gear is not easily obtainable; as such, after one has obtained the elite gear, they will typically have a massive pile of inferior pieces waiting on them underneath that elite piece, which can cause some trouble whenever they decide it’s time to clear everything out. This is one core reason for which the ability to salvage multiple gear pieces would be more convenient than the status quo, wherein we can only salvage one at a time and must wait much longer until everything in the pile has been salvaged.
I delete every new gear I get that isn’t elite right away. Why keeping it and eventually even level it?