I'm hanging on to the old 6S until Apple bring back the headphone jack...
In the meantime the iPhone SE is a good phone, has a good form-factor and still has a headphone jack.
The Camera on it started acting flaky about two weeks ago and it stopped getting pictures stored intact. So, I finally found a new open source camera app and it works perfect again. The default camera app seems to be buggy.
I wonder if a system update was engineered to 'encourage' a phone upgrade...