I don't think you understand the market for those concert grands. First off, they are into the $250k and above range for true "concert grands." However, the idea that private individuals need to buy one is ludicrous. They are sonically designed for concert halls, even a mansion would not be big enough to properly make use of one. So, take those off the table, they are for the top 100 players, the millionaires/billionaires, and concert halls, not for average serious musicians.
Second, it's a bit delusional to say most serious musicians can easily afford 22k Euros on what is essentially an experimental piano. I know dozens of serious amateurs/semi-pros/pros, and basically none of them could afford this instrument.
This is a toy for the rich and the superstar musicians who actually get paid creme of the crop wages. The rest of us 99% of the serious pianists who get paid between 0 and 100k a year, lets say, will get much much higher value on 22k euros by buying a used Steinway, Yamaha, or other instrument. Hell, I've been playing classical piano, trained with concertizing pianists, for 20 years and I make great practice use out of a $9k Kawaii bought for $6k.