> The iPhone can replace all of those functions you listed
> It does not have an AM/FM station
> You don’t have literal CB
> You can’t play the literal CDs
So not the same function, got it.
As for your last example, you might as well replace "iPhone" with "tape deck".
iPhones did replace tape decks. The mini hi-fi in my living room, my car stereo, my tape and CD walkman, all are now either bluetooth recievers for smartphones or play audio directly from the smartphone.
The function wasn't "playing tape" or "playing CD", it was playing music or audio books.