Mellotronists

Classical music is generally not written to be
performed by the composer - he gets an orchestra
to do that, who all dress like shop mannekins and
are trained so that they reliably reproduce somebody
else's dots on a page without colouring it with their own ideas.

  Oh yes they do color it with their own "ideas".  It's just that those ideas are not from a macroscopic level ,  as in popular music.  Classical music was once the popular music of the time. (pick a "time". any time).   When Holst debuted "The Planets" (1913 I think) , people danced wildly in the aisles.  Sound familiar?

fd......I've had the most fun in cover bands