This seems like a problem in search of a problem. They have L & R printed on them, if you've not managed to learn which is which using the shape or a physical

This seems like a problem in search of a problem. They have L & R printed on them, if you've not managed to learn which is which using the shape or a physical landmark like the mic or remote by the time the markings get worn off then there's a bigger problem occurring. Surely an audiophile is going to be substituting the earbuds for cans straight away anyway.