Like how to be successful in the marketplace? Like how to have a nonexistent dealer network? Like how to release upgrades that have problems?

I don't think that any of the big three are going to worry about open system keyboards at all, unless one of them actually DOES turn out to be commercially successful. Wersi are hobbled by VERY high prices, and a very sparse dealer network (in the US, anyway), and the MS...

Remember, the learning curve on an 'open' keyboard, especially the MS is fierce. Given that apparently, most of the features (according to SOME) of even an embedded system get seldom used, where is the market for these expensive (some can even say overpriced) highly technical arrangers?

Most of us, I would be prepared to say, like our arrangers because we can turn them on and make music. We don't have to worry about Linux 'wrappers', Vsti compatibility problems, and configuring an 'open' system. If you are a geek, they sound perfect... If you want to just make music with the minimum of fuss...

It's going to take something to take off commercially before Yamaha etc. are going to change from a proven, viable system. Until 'open' systems are as turnkey and idiot-proof as closed systems (and by doing so, they basically turn into closed systems), few are going to want the hassle.

What's the most talked about feature on MS's (and even, to a lesser extent, Wersi)? Their ability to play Yamaha styles, without translation. Not exactly the groundbreaking, innovative stuff we've been told is these keyboard's strengths!

If you want something that plays Yamaha styles and sounds, get a Yamaha! Save a chunk of money, and run the VSTi's off a laptop... MUCH less expensive than a Wersi or an MS...

Eventually? Maybe yes, but unless the big 3 go down that route, don't expect any 'open' system to be affordable, OR easy to operate. That's what the big 3 specialize in, and unless they take up the challenge, I predict that 'open' system arrangers will remain niche products for a niche market.