Apple and the fanboys calling it a "Legacy" port are completely out of touch with reality.
Most of the devices I have purchased in the last year have been USB-C. Sony headphones, LG display, my car even has USB-C charge ports. Look at many manufacture lineups and the new flagships are USB-C. I do still have a bunch of USB-A devices, but they're older buys at this point.
I think there will be a few year gap, but 10 years might be a little too pessimistic. Time will tell I guess!
* https://www.gurufocus.com/term/InventoryTurnover/BBY/Invento...
Why would headphones have a USB port? BT headphones that need it for charging?
It is now a legacy port on Apple laptops. I think it's the correct term to use in context, regardless of fandom. It is referring to ports that existed in the past, and are being phased out on the platform in question.
Soon enough there will be a major shift