9. Rick Rubin — Beatmaker
Every so often, Rick Rubin reminds us that he still exists. Maybe he’s lying on a couch in a commercial for a Jay Z record, or he might produce a song for Eminem. In either case, those who aspire to rap over the drum and guitar instrumentals he’s been crafting since the ‘80s would definitely download an app that allowed them to produce similar tracks themselves. That’s technology for you.