Makes no sense. You'd lose the compatibility with thousands of accessories in exchange of... nothing.
Good that you can see other peoples world view, and not just your own.
I don't own a single Lightning accessory, and given that I can buy about 400 different Lightning speakers, and 7000 different docks, and odds are I can get at least one of each with a USB-C connector as soon as the phone is released, your argument is completely irrelevant. Oh wait, USB-C is a standard, and I can already get hundreds of different accessories of each!
Dude if u r upgrading from 4S why won't u go big and get the iPhone 8 u waited for a long time u should treat your self with the best
Price. I have no need to pay twice the amount of money, to get a phone that does the exactly the same, but has a slightly better screen and the newest design.
What if it's USB-C to lightning? Will you compromise with an iPhone 7?
I will consider that, but likely not, but in the end it depends on the iPhone 6s/7 price difference.
I am done having a hundred different chargers, now that my Macbook has an international standard in USB-C. With a new Lightning iPhone I can use the same charger, but i would still require two different cables.
I just came back from a short vacation, and having to bring a charger for the Macbook (USB-C), one for my girlfriends Macbook Pro (Magsafe), one for her eBook (µUSB - Okay, we didn't bring that one due to the excellent battery, but the argument remains), one for my iPhone (Old wide plug), one for her iPhone (Lightning) and one for my shaver (Some proprietary one). Its so ridiculous!
It seems like iPhone 6s for you it is. Though I have absolutely no idea why on earth anyone would choose it before a much more up to date phone (except price) But again, considering you are using an iPhone 4s, it should not be surprising.
Price. As mentioned above, I don't care about paying 500$ for having a slightly better screen and the newest design.