I switched to Apple after my Nexus 5 stopped getting updates about a year after I bought it. Bought an iPhone 6S second hand for $320. Still getting updates no

I switched to Apple after my Nexus 5 stopped getting updates about a year after I bought it. Bought an iPhone 6S second hand for $320. Still getting updates now, and looks like I will for the foreseeable future. The core feature iPhones are missing is USB Type C- I won't upgrade to a new iPhone if I cant use the same headphones on my laptop and phone (either 3.5mm or TypeC)