Or better yet, a 3.5mm plug, USB, and Bluetooth. No matter what happens with the 3.5mm plug, USB and Bluetooth aren't going anywhere anytime soon. Might as well toss them all in to make sure it's actually future-proofed.
It honestly does not matter, since they're compatible. You're trying to make it controversial, but it's really not. My phone uses Lightning, but that doesn't make a bit of difference when I plug it into my car.