Do you think a Mozart and Beethoven or Debussy and Mahler or Coltrane and Hendrix would have gravitated to computerized composition, or computerized recording techiniques?

Computers have no place in music.  It's a downgrade on quality if not for the simple fact that sound is being represented digitally.  Analog is much better and the limitations imposed upon the artist required the artist to play better, spend more time on their instrument which leads to more creative ideas. 

We are not getting better music in the modern age.  Computers are discouraging the youth culture from learning to play instruments.  It's a horrific situation when you see 300K kids bobbing to techno music.  We are at the lowest and darkest time in the history of music. 

Mozart, Mahler and Hendrix probably would have tried out computer music out of ignorance or curiosity.  They would have made worse music doing so

People can't stop from over using pro tools.  People can't stop eating salty greasy potato chips either.  Digital music has been a cancer to music.  The farther we move away from live playing and quality musicians interacting in real time the farther we move away from great music.

Music should be played by people, not computers.

Once you edit with a computer ... it's no longer the artist playing. 

I don't look down on artists using computers.  I understand why they do it.  Mainly they are like sheep who think they also need perfect sterile production values just like all the other sheep who believe the same thing.  Magazines like Progression that rate artists CD's on production values don't help. 

The best stuff was made before drum machines, digital music editing and pro tools.

Prog bands need to get out and play live.  Get back into offering more dynamic and less distortion and compression so the listener can feel and be moved by the music and not have it die on their ears due to over saturation.

Sorry to rain on the party.

(1) Cost. Let's say I want a track with a decent Hammond organ on it and a Moog Modular. I can use VST instruments (Virtual Studio Technology) (Computer simulation) and it costs me a few hundred dollars. Or I can pay $40,000 just to get these two instruments. Which are totally unreliable, by the way (a Moog 55, that is.) 

(2) Then I think, right, I'll find a drummer. There are none in my area. So that'd involve me paying someone to sit in. Bring money. Or I can just ... use a VST instrument.

(3) Studio time. Look up how much studio time costs, folks. This is incidentally all done digitally nowadays, computers again. Doing what is done today on master tape would be exceptionally difficult.

If we all went back to using 1970's or even 1980's technology, there would be no prog albums made, as the audience for such music is now pretty small and most people prefer to either "appropriate" music off the internet, use download platforms as free radio stations and generally dislike paying for music, anyway. Piracy will eventually kill most decent music off, that's for sure, but it's also another post. Suffice it to say that it's pretty much impractical NOT to use computers in some way, shape or form, now.

You could take the argument back a generation and say "Do we really need amplified instruments ? " Musicians have nearly always embraced technology. So long as it's used well, it's fine. Plus. My keyboard player is in Finland, my guitarist is 15 miles away, we have never all met up but it's now possible to collaborate and play music together. 

Another point worth mentioning is that most people who listen to music now are listening to VST instruments. You are probably not hearing a Hammond C3, Fender Rhodes, Gretsch USA Custom drum kit or ARP 2600 synthesizer but a computer simulated or sampled version. It is, in a lot of cases, very difficult to tell the difference, unless you know what to look for. 

I'm going to fess-up here. I'm not a musician and I will never call myself one, my playing skills are terrible and I have long since come to accept that I lack the necessary manual dexterity to ever be good with any instrument, whatever inherent natural skill it is that musicians have, I was born without it. I can get an instrument to make a sound but that is as far as it goes, even after months of practice I never got any better, even those who were kind enough and patient enough to try and teach me had to accept defeat.