I thought I’d be using the adapter but my Apple headphones that come with an iphone are collecting dust for like two years now since I got AirPods. Not going back, couldn’t care less about headphone jack. Now I wish charging port was gone too now just to push the industry even further.
Phones already support wireless charging. Why remove wired charging because you don't use it? It is harder to use a phone while it is on a wireless charger vs use a wired charger.
There are enough external peripherals (external microphones, HDMI output, etc.) that are useful that I hope they don't get rid of the lightning port for quite a while.