A lot of this depends upon how you respond to upgrades/updates. Yes, if you buy a new iPhone you will have to update iTunes because the issue will be forced by Apple in the phone's software. Yes, if you upgrade the iOS in the phone you may have to also update iTunes. You have to be very aware of the implications of doing one update or purchase of newer hardware on how it will resonate with the rest of your system unless you behave as Apple would intend for you to behave and never have any one thing in your system be any older than about 4 years. Even having an iTunes account may eventually result in your being forced to update your iTunes which may need a newer operating system version which will mandate newer hardware leading to a newer computer purchase... Me, I live in a time bubble. I run 8 year old software on a 12 year old computer. I decided to stick with iTunes 7.5 because I don't buy any Apple i-gadgets and don't have a Store account and I don't see anything in newer iTunes versions I like. 😉 I save a lot of money! 😁 (I figure I have spent about $700 on computer stuff since 2006, and that's including peripherals.)