Conspiracy, Laziness, or Nothing New Under The Sun?

Have you ever wondered why there don't appear to be new instruments created? When was the last time a new instrument was added to an orchestra lineup? When was a new horn or woodwind last made to add to a concert or jazz band? Does no one in the music world care about new sounds except for electronic sounds? Are no new instruments possible, or are the people in power so traditional that they won't consider trying something new? Anybody have any thoughts on that? I find it hard to believe that we can't make any new instruments that sound good that haven't already been made in the 1600's or 1700's.