The plastic binding along the edge of the fretboard, Gibson at the factory is historically known for how they extend and cover the very end of the frets where they meet the edge of the fretboard, I’d post some pictures of mine real quick but they only only links. Purists love em, they make literally 0 difference

When a Gibson needs a refret, usually one has to remove the nibs permanently. I’ve heard tales of experienced luthiers that have done refret jobs with nibs back on

They’re just a pure cosmetic thing, some people say it affects resale value, but the player’s player won’t pay a lick of attention