Just something else to charge
...and lose
...and easily damage because they are small
...and still not sync well with video
...and have mysterious software pairing issues at the most inopportune times
...and not be able to work with so much other tech where 3.5mm just plugs in now
...and not be as easy to share with a friend as easily as a 3.5mm splitter
etc.
Nevertheless, I think Bluetooth is fine for those that believe it covers their needs well. I'm against somewhat forcing the choice between proprietary (probably never work with ANYTHING else) Lightning vs. Bluetooth on everyone that would like to stick with iDevices as their mobile devices. 3.5mm doesn't have to go to embrace either of the other 2 options. If either were obviously better, let the masses make the transition in pursuit of superior quality, experiences, etc.
My opinion: perfect Bluetooth wireless first and THEN consider evolving away from a thoroughly ubiquitous, no-big-licensing fees standard that works perfectly fine. This thinking of having to kill 3.5mm so that stuff like Bluetooth can progress is just ridiculous. If some of us can actually believe that, why not apply the same thinking to everything else in the iPhone? Why not kill the (older than 3.5mm) battery (technology), (older than 3.5mm) camera, body, screen, buttons, etc so that everything else in an iPhone can progress to some "the future" destination? I know, I know, Apple is not ejecting that other stuff (yet
😱), so the only "progress catalyst" that needs to be spun right now is the progress away from what Apple
IS ejecting.
😉