Total nonesense. Professional audio interfaces with multiple channels at 192 kHz 24 bit have been operating on USB 2 for decades
Totally fair. USB 2 can handle high-res audio, no question. The issue isn’t bandwidth, it’s that Lightning doesn’t natively support USB Audio Class 2.0. Apple’s implementation limits how it handles digital audio, which is why the USB-C AirPods Max can do true lossless and the Lightning ones can’t.