I've been working in, on, and with computers since 1975 (one year before Apple was founded), and ITunes is the only Apple product I use. All of my experience has been with PC's and mainframes, and I have yet to get into smartphones.
None of that information matters, of course. What matters is that the world has lost a tech visionary, a tech innovator, and a guy has died way before his time.
May he rest in pain-free peace.