Here is what I am sensing after my initial read of this post, understanding that I am improvising a little:
The tuning method was changed to ET for commercial reasons, as opposed to artistic reasons. Now, living in the new era of rapid communication via internet, and free from the tyranny of capitalism, people will come to realize the superiority of non-ET tuning (since ET is boring, like black and white TV), and there will be a revolution as the musical world has never seen. Now all we have to do is get the word out

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Now I will re-read and address each point. Understand – my comments here are just for fun. There is no way anyone can win in a discussion like this. So, I am just having fun here.
Q: When one has experienced colour television, then black and white is boring.
A: I can’t say for sure that you do not have an additional sense perception regarding music color that I lack. But how can you say for sure that you aren’t simply looking at the color of the actors’ clothing and background scenery during a color televised production of a Shakespear’s play, while not listening to or understanding the content of the play?
Q: It's not beat hypersensitivity, it's what is part of the sound and what is extraneous. The unequal temperament inserts resultant notes which are part of the sound and make the sound richer in texture, more resonant and lush.
A: Sounds like it could be beat hypersensitivity to me. Piano strings exhibit inherent inharmonicity. What would you call someone who refuses to listen to piano music for this reason, and will only listen to piano music performed on a pipe organ with its more even distribution of overtones. The listener says: “I find the piano’s inherent inharmonicity to be disruptive to my listening experience.”?
Q: I get your point but it's actually a matter of the physics of sound. A sensitive performer will hear the effects close up even if the audience don't, and the reaction of the performer will have an effect on how the performer plays. Listening more will result in a performance that the audience listens to more also.
A: I get your point also, but I find the piano’s inherent inharmonicity to be disruptive to my listening experience. It’s actually a matter of the physics of sound. A sensitive listener will agree with this.
Q: Your assumption is that pianists know that there is an option. For many suffering blinkered piano tuners there isn't.
A: My question still remains: Today, what percent of solo piano performances on modern instruments are done with non-ET tuning? In addition, in this age of the internet, what do you see this percent being in 20 years from now? 100 years from now? What would you think if you could see in the future 100 years from now and learn that ET is still the universal tuning system? Would you conclude that there is a massive conspiracy to suppress the will of the people? Could you ever envision a scenario where you would conclude that ET is actually the preferred tuning method of musicians or is this an impossibility?
Q: And what non ET temperaments have you experienced on a modern piano? Harmonically tuned modern pianos tuned PERFECTLY demonstrate a GORGEOUS SOUND. What is your experience of such alternative?
A: I have listened to maybe 20 samples that were put on Pianostreet in past threads (maybe a year or 2 ago). I will take time to listen to the examples in this thread in the next few days. I’m sure I will enjoy it. Sorry for my silly answers here!
