You must not have heard, seen, or played the Abacus, Ikarus, Scala, or newer Wersi products in person or I'd assume you'd not say they are technically inferior to Yamaha.

You're right about Yamaha's philosophy being different as Yamaha's approach is to sell a keyboard to you then sell you a new product a few years later making the older one obsolete. Wersi's philosophy is to sell a product that is great then update its software making it better each time. The user also has the ability to utilize third party software and samples to structure the keyboard any way they'd like. I'd hardly call that philosophy backward thinking.

Yes, Wersi's price is more expensive but if you figure out how much its going to cost you when you replace another manufacturers keyboard every couple of years when they make them obsolete then you'll realize the Wersi isn't that expensive.

I've owned the best arrangers and keyboards Yamaha has to offer and currently own the Wersi Abacus Duo Pro, Mediastation X-76, Korg Triton Pro, Roland XV5080, and many other synths and samplers. I can compare these instruments side by side so for me its not hard to hear and see which ones compare well to one another. At this time I have no intention of getting rid of my current setup to buy any new Yamaha, Korg, or Roland products. I had considered adding the Korg Oasys to my setup but after trying it out it lacked the features my Wersi Abacus has and cost a bundle although the Karma synthesizer features were quite nice.