My friend group used to be very big on "pass the aux cord" when we're hanging out. It was incredibly easy to switch out our phones (or iPods and portable CD players before that) to let all of us contribute music for the gathering.
Now? Ok, I disconnected from the BT speaker. Do you see it yet? Lemme try turning the BT speaker off and on again. [BING BONG!; "Connected"] Ugh, it reconnected to my phone. Let me just turn BT off on my phone and you try again.
It's just such a PITA with BT, and having to keep USB-C and Lightning adapters on hand is even more annoying than that. If only there were a reliable and dedicated connection for audio devices....oh well.