They are in a duopoly with Google though- if Apple increases their tax to 35% tomorrow, what happens? What if they increase it to 50%? What if they say you can

They are in a duopoly with Google though- if Apple increases their tax to 35% tomorrow, what happens? What if they increase it to 50%? What if they say you can’t have a web app, you can only have an iOS and Android app? What if they say they no competing services are allowed, so every iCloud, Apple news, weather etc. competitor is gone?