if you disconnect your headphones the device still behaves as if they’re plugged in.
Again, leave the dongle connected to the headphones, not the phone.
It’s so much less convenient
It is less convenient, but I’d argue not by all that much. More importantly it’s not any less convenient for the vast majority who are already only using Bluetooth.
there’s just no downside to having a dedicated headphone jack
It’s an additional, and to most people superfluous, point for water ingress. Water damage is the most common type of damage in phones.
It takes up space which could be utilised otherwise, like with a slightly larger battery or larger speakers or camera modules.
It’s an additional part which needs to be manufactured, stocked, installed and purchased. Extra cost which only benefits a few. This is especially important to Fairphone in particular because they don’t use off-the-shelf components and promise to supply replacement parts pretty much indefinitely. I.e. Fairphone would have to design a custom module and then have that module in stock and manufactured specifically for them for the lifetime of each of their devices. That’s not a trivial expense.
Just leave them connected to the headphones.
Dongles with an additional usb port exist.
Again, leave the dongle connected to the headphones, not the phone.
It is less convenient, but I’d argue not by all that much. More importantly it’s not any less convenient for the vast majority who are already only using Bluetooth.
It’s an additional, and to most people superfluous, point for water ingress. Water damage is the most common type of damage in phones.
It takes up space which could be utilised otherwise, like with a slightly larger battery or larger speakers or camera modules.
It’s an additional part which needs to be manufactured, stocked, installed and purchased. Extra cost which only benefits a few. This is especially important to Fairphone in particular because they don’t use off-the-shelf components and promise to supply replacement parts pretty much indefinitely. I.e. Fairphone would have to design a custom module and then have that module in stock and manufactured specifically for them for the lifetime of each of their devices. That’s not a trivial expense.