To be fair, I changed the battery in my wife's iPhone 5 the other day. Okay, it needs a bit more prep than opening a battery compartment, but I would have completed it in less than 15 minutes if I wasn't also replacing the Lightning port and the screen at the same time.
Of the four phones I regularly use, all of them have proper replaceable batteries (three Notes of various vintages and a Jolla). I won't have a phone that doesn't have this sensible function, so I'm probably stuck with Note 4s for the foreseeable future.