It depends though... Even though I have a smart phone, I'd hate to be screwed if it ran out of batteries, not to mention it's one hell of a conversation starter... Also, I do know this older business guy with a Lexus LS and tons of cash, but swears by his flip phone.
But conversely on a side note, wonder if someone can figure out a way to jury-rig it to work with our e9X's or even in current-gen non-i8 cars