There is a wide range of high quality music apps that only run on iOS. Wireless audio is not an option for playing instruments, because of a noticeable delay be

There is a wide range of high quality music apps that only run on iOS. Wireless audio is not an option for playing instruments, because of a noticeable delay between pressing a button and hearing a sound. They already killed the audio ports, but with dongles musicians can at least still use wired headphones. Killing all ports would also kill all instruments on iOS.