In Western classical music, an orchestra is quite loud enough to be heard with amplification. I guess that's why there are so many of the quiter instruments, eg violin --- although a solo violin can be heard in a concerto!). I guess there is still plenty of unamplified music in the world: just that it is not the music that most people listen to.
Even in my own area of taste and concert attendence, carnatic music, amplification is, sadly the norm. What's more, this is often badly done in venues with bad acoustics. Far worse, it has affected the performers themselves, with many quite unable to project their voice any further than the microphone they sit behind. This is first-year dram school stuff, and yet artists with decades of "experience" cannot sing to people fifty feet away from them. Added to this... their microphone technique is often lousy too!
Copying my original post here again for thought,
http://www.hifivision.com/music/22623-what-should-constitute-make-good-music.html