You know if that happen then flip phone users will have hard time because network will promote only high end selective phones. SIM card gives you freedom of putting it in $25 or $640 phone and it works just fine. People with security, budget and privacy concern go for flip phones. Just like net neutrality, phone neutrality is a good thing. One should never be forced to purchase smart phone if he does not want it. A dumb phone just works fine for calling and text messaging. I have never used internet on my phone and I will never be excited about it (3G 4G, 5G or anything). I carry my laptop everywhere I go and it serves my need well.

I must add you can find flip phones cheaper than cost of lightening cables.