I have to admit using wired headphones is a drag and gets in the way. No one with bluetooth headphones can argue that they prefer a wire purely from a port/dongle perspective.
Where wired headphones shine is that they have no latency, no transcoding, no added costs, no charging needed and rely on the DAC built into the device you play them on, so can be louder and arguably better depending on the system you use to listen. These are important factors to some professions such as video editors or musicians, the very people who use most apple devices. The only up side is very few use a phone to do such things but they're probably invested in the rest of the ecosystem too.
I personally hope for apple to switch to USB-C, for a few reasons. It's a great connector, has the same qualities, ie reversible, can support fast charging and fast usb 3 speeds (though when does anyone plug one in), it'd also lets you use pass through charging on a MacBook Pro etc with a reduction of different cables and helps standardise things. Sharing android and iOS based attachments, docks, charging etc would reduce cost for makers and stimulate new products. It also allows for OTG and other clever storage options that android and iOS can share.
We've had lighting long enough that a change would horrify most but every single apple device needs to move on and that courage to remove the 3.5mm jack needs to continue if anyone is to benefit properly from progress.