The car is another issue. Neither of our vehicles have BT and we're not looking to buy new cars for at least another 3-4 years. I'm certainly not going to get rid of my perfectly functional and trouble-free truck just to get BT.
As for the W1 chip, from the research I've done it seems that it solves connectivity issues and adds battery life to the headphone. So far I've not read anything to suggest that it will make the sound better. That will come with BT 5.0 which I hope we start seeing sometime next year.
As I alluded to earlier I'm not against going wireless but I think it was a little too early to pull the plug, pun intended
With all the other outdated tech that Apple pulled from their devices there already was something superior and therefore the adoption of newer tech was fairly painless. Today in 2016 there's nothing that's better than an old fashioned 3.5mm jack and headphone.
The supplied adapter is fine but it doesn't work 100% of the time. The controls stop working at unexpected times. Sometimes the sound keeps coming from the phone instead of the headphones I just plugged in, and sometimes the headphone's mic stops working during a call. Of course this doesn't happen all the time but the times it does happen is extremely frustrating. Point being...new tech needs to work 99.999% of the time before being introduced and forced on users.