Can't you just leave a dongle on any wired headphones you have? Assuming you only use them with your phone and computer and don't have a CD player or something.
I guess that's my question, what other devices are people using? I'm just curious where people need to remove the dongle because maybe I have bad imagination but not much comes to mind.
I listen to music on earbuds on my phone on the go, a laptop at a cafe, and on my computer at my desk - all these have USB-C.
Even modern DAPs like Sony Walkman have USB-C as they are typically based on Android.
That leaves all the "legacy" devices that only a small minority use - home hi-fi stacks, vinyl record players, iPods, CD players, minidisc players?