PSR-EW425 has 76 keys, speakers, weights about 17 lbs (8 kg), costs about $600. I think, Yamaha tries quite hard NOT to make it professional enough, but because of competition, primarily with Casio, it comes risky close to becoming a professional instrument. Nevertheless, lack of polyphony, controls and better sounds keeps this gap existing. I think the whole line is carefully designed so that everyone would still be motivated to buy Genos, regardless of its price. While EW425 is simplified, it reveals that it's possible to create a $1000 keyboard that can be just the keyboard most of players need. The sounds and styles are now updateble, basically people could buy it and forget about buying other keyboard for 10 years. But it's not how it works today. I think, it's just vital for the economy that we would buy a lot of stuff, even if it hurts ecology and other things.