The Apple TypeC-to-3.5mm dongle is cheap and measures better than most phones in terms of audio quality.
If you use mostly the same pair of headphones, you can attach the dongle to them and use them just like before. But it’s annoying if you use many different headphones and have to either move the dongle from one set to another or buy multiple dongles.
I gave up on avoiding phones without a headphone jack.
The only reason to have a default map is political.
People actually using maps and GIS pick whatever projection suits their needs - which is not Mercantor most of the time to begin with. I work with GIS a lot and never use it, unless forced by some API. But even then, reprojecting is trivial.