At this point I would pay a premium to have replaceable batteries again.
That said, I think the tradeoffs being made right now are probably the right ones. Apple's latest devices have gone to an electrically released sort of adhesive (versus the older pull-strip removeable adhesive, which is a big step up from the "glue it in" approach many vendors take), and for a given volume, you get more battery if you can rely on the phone to protect it from damage - which is why almost everything with an internal battery uses some variety of pouch cell. They're quite a bit more fragile than the hard-cased batteries, but you get a lot more battery in the volume than you do with the hard cased ones.
As long as it's not incredibly irritating to replace the battery, I'm fine optimizing the daily use thing (battery life in a given phone size) over the once-every-few-years thing (replacing the battery).