This is true, but for whatever reason people always overlook the fact that you can still use your wired headphones with a USB-C adapter on most modern smartphones (I believe Samsung devices need one with a DAC). And that, depending on the quality of the phone’s DAC, the wired headphones may actually sound better through a USB-C DAC than they do through the headphone jack. You can even charge your phone and listen through wired headphones at the same time using the USB-C port. Wired headphones are only incompatible with modern smartphones if you choose for that to be the case - there are plenty of ways to solve this problem without clinging to an older phone (though there is nothing wrong with that solution either).