Re: The advantages of poverty
Also the advantage of 3.5mm jack dumb phones, which inherently are better quality as any wireless earphones need an DAC anyway and have the additional overhead of Bluetooth. Space and power constraints also mean that five year old phone with 3.5mm analogue jack may have a better DAC and audio amp than the device(s) in the wireless headphones / earbuds.
Also the Analogue 3.5mm headphones work on anything without pairing, don't need an dataslurping app etc.
A BT earpiece is handy for handsfree conversation. I've got good BT stereo earphones and I've gone back to analogue, because no pairing and work on more stuff.