I've tried something like that in the past and found them less reliable than the FM transmitters. But I suppose that was a while ago and maybe the tech has changed enough that the affordable ones work well.

Still not willing to spend twenty dollars on cheap plastic when that money could be spent on 2 days of food or something that I don't already have a cheap solution for. I paid less than $10 for this cord over a decade ago and it still works fine.

Yeah the Bluetooth is convenient, but I don't think forcing people to that platform is a solution. Also Bluetooth still has inherent issues. It's never 100%. My audio doesn't hiccup or start cutting out unless I unplug or damage my wire. I've never accidentally plugged the wire into someone else's speaker. I don't have to reset, or look up passwords for my wire before I can plug it in.