I have a iPhone 6 +. I don’t really see a reason of upgrading to a new phone. The new features on the latest IPhones don’t seem anything incredible or something you really want to have. I think since Jobs died Apple has become somewhat mediocre especially in new ideas area.
I also have have a IPhone 8 for work and like my 6+ better because of its size.
The features vs high cost of a new phone to me is just not there. I thought I was the only one that thought this was kind of ridiculous.