I am tempted to get a 7+ to replace my 6S+. Only reason I am doing that is the battery is going on my 6S+.
This is where I am. Got a 6s+ but not even sure I want to upgrade it to anything. Battery is actually still pretty strong. Not sure how it will work with iOS11.
not to mention that it is ip67 if that matters.What's criminal too is the standard 8/8+.
8 - 700/850
8+ - 800/950
Think it's clear why the 6S and 7 are still around. To be honest they're both still perfectly capable.