no need to upgrade
I have been a big fan of Samsung phones since the SIII, but it's getting to the point where there's no real need to upgrade -- at least for the last couple of iterations. Basically, the only things they've been touting are a better display, while with the latest version they take away the feature that people liked the most, which was the user-replaceable battery.
I don't think phone companies appreciate how much people actually care about things like batteries and how they're swapped. Given the fact that phones are getting slimmer all the time, which is pushing batteries to their limit, people appreciate the ability to replace batteries without having to upgrade the phone -- at least I do.