Yes I have, because it frees up space in the phone for other uses when a phone is meant to be mobile. If my phone has room for things I care about more than a headphone jack, great.
I am arguing that if you are concerned about sound quality to the extent that bluetooth is worse than analog (and bluetooth headphones are getting really good), then use a device better suited for it. Otherwise, you are already using added devices such as a high end DAC with your phone while listening in a quiet room. I will wait and see how traditional headphones sound over lightning before I judge.
For the average person, who is using his phone in the car, exercising, or in loud places, sound quality is already not the biggest issue. I use bluetooth in my car and some headphones, and both work great for everyday uses. I just don't think it is a big deal unless you have multiple sets of headphones, or you charge and use the jack while using headphones on a regular basis. I completely understand for some people this be a pain in the ass, I just don't think it will be a big deal in the long run for most.
If this helps push bluetooth to get better, I think its a good thing, because for mobile uses, I think bluetooth is superior to cables.
Edit to add: $9 for the adopter by the way. Shockingly cheap for Apple. Doesn't say any headphones will require a DAC. http://www.apple.com/shop/product/MMX62AM/A/lightning-to-35-mm-headphone-jack-adapter?fnode=97