So you don’t have to carry two charging cables.
There will be some transition pain, but standards evolve, and users adapt.
The legislation kicks in next year, but it looks like Apple is getting in early.

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Hold on a second.
Because the AirPods are essentially an iPhone accessory, this is exactly the right way to do it.
Which is why we are expecting a USB-C update for the AirPods, both regular and pro versions.

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Probably, that will be the only changea simple swap of the charging port.
Apple has done this mid-cycle case-swap before, also to accommodate an iPhone charging change.
It used to be so convenient to borrow a USB-C cable whenever I was in a tight spot.

Dan Clear / Unsplash.
But for others, even this synchronized update could be unwelcome.
Even for the dedicated, USB-C-loving tech nerd, it doesn’t change the cable-carrying situation one bit.
It’s a pain, to be sure, but only in terms of convenience.
AirPods do no USB data transfer, and their charging speed is already limited to manage heat.
So it’s all down to how many cables you are prepared to carry.
Don’t think about it.
Eventually, you’ll own both USB-C AirPods and a USB-C iPhone.
Until then, worry about something else.