woofgang - When I spoke of music that can't be replicated live, I was talking about music that was either studio-created, and lacked the technical facilities at the time to reproduce it in a live setting, or that would require more than the original musicians who recorded the music, to replicate it on stage.
There are endless numbers of bands and artists who use additional musicians and effects to reproduce their music these days, with modern technology at their disposal - I have seen Brian Wilson perform Good Vibrations a couple of times, with the aid of modern technology, and over twenty additional musicians.