Huh? It sounds more like they deliberately broke everyone's devices except their own so you either have to pay them more to continue using your existing headset with an adapter, or if you have a bluetooth headset you're just shit out of luck unless you buy an Apple headset. How is that not anticompetitive?
No actually any iPhone with a headphone jack continued to have a functioning headphone jack. And competitors marketed their phones with headphone jacks for a year and ended up also abandoning that feature.
It's not feasible to use an old iPhone forever, I tried. If the required app updates don't get you, the carrier will.
The big competitors like Samsung removed the jack too once they started selling their own wireless earbuds. They realized they could use Apple's strategy too.
