The AirPods come with a charge case that holds 24 hours of juice. If you manage to end up in a scenario where your phone is out of power, your AirPods are out of power, and the AirPod case is out of power, that would be a fairly impressive bit of poor planning.
Besides, you can charge your phone and your AirPods at the same time, you just need to have two outlets (or two USB ports) and two cables.
I would want to actually use the device(s) to make calls, send messages and listen to music - not just carry them around flat and useless in my pocket.
> that would be a fairly impressive bit of poor planning
Murphy's Law in this case means that the best outcome is to remove the possibility of poor planning by not having to juggle multiple devices that require you to plan your charging schedules around in the first place.
Which will need charging themselves.
Now I have to choose between being concerned about either my phone's battery or my headphones' battery.