Samsung was able to pull this off with the S5 A DECADE AGO:
- removable back
- removable battery
- headphone jack
- SD card slot
- IP67 water resistant
This is an anti-environment moneygrab plain and simple. They omit the headphone jack so that they sell you the solution, which just so happens to be their brand of wireless headphones, dongle, whatever... if you actually like FairPhone you'd criticize them over this bullocks instead of being an uncritical parrot.