Comment by kalleboo

This is really interesting so I did an experiment.

I connected my iPhone to a 5 GHz-only network on channel 36, and my MacBook Pro to a 5 GHz-only network on channel 48, and I could still AirDrop between them at 300 MBit (which exceeds any real-world speed I've seen on 2.4 GHz), and both devices retained connectivity (an iperf on the MacBook dropped from 600 Mbit to 300 Mbit while the AirDrop was in progress)

After messing around with this and sending around 10 AirDrops, now the feature is completely broken no matter what I do (same network, etc) so who knows (lol)