Apple’s headphone adapter for older iPhones sells out, possibly never to return

When Apple infamously ditched the headphone jack with the launch of the iPhone 7, it at least provided customers with a Lightning-to-3.5 mm adapter either right in the box or as a $9 standalone purchase in its online store. Now it looks like that adapter is being retired.

As MacRumors first noted, the adapter is showing as sold out in most regions, along with a few other Lightning accessories, like the even-more-archaic-seeming Lightning-to-VGA adapter. That includes the United States,...