Very interesting thread. I watched the video of comparison of Medeli AKX10 and Ketron Event.
I don't have any experience with ketron products and play Yamaha Genos as a hobbyist, since I don't need two keyboards I'm rather not interested in Event and will wait for the module which might have more sense for me, if at all, but I'll still express my opinion
I don't think that all the points raised in the video are accurate, although indeed some are certainly valid.
For example, Ketron has an ability to add a monitor with a touch screen (of any size and tilted as required). Of course it doesn't mean that the Event's screen could be larger but a descent workaround exists.
As for the buttons - well, I don't know whether they will break or not, I do see (visually) the same buttons on SD9/SD90 - did many Ketron owners complain? Probably people who consider buying Ketron Event should ask the owners (in a relevant FB group or something). As for the convenience - I do agree that the style control section could feature more buttons, but on the other hand the video doesn't mention advantages the Ketron event offers: up to 8 variations, different flavors depending on the chord, like CV in Korg (yeah, I know that Yamaha has somewhat similar although less powerful option available via external casm editors), obviously audio engine and more useful features like bass/chord locking. Of course every keyboard has its weaknesses and strengths, and I'm sure, Ketron Event is not ideal, I'm just saying that mentioning only the weak points is not fair.
I do agree that adding leds to the buttons like its done on Genos is the best option for a player though.
Its interesting BTW, whether we could use an external controller, especially with Ketron Event module when it will be released, to map the "missing" Style control buttons to the physical buttons of the controller - this might solve the issue as well. I understand that for the Event keyboard its not that practical to have an external midi controller, but for the module, why not? The same applies to the lack of +/- buttons and page navigation - maybe module version / future OS update could address that by providing a capability to map controller / improve the OS interface. Having said that, I do believe that all-in-all Ketron Interface is behind the other competitors...
Now regarding the style creation process - a feature that I'm interested in a lot. Well, I believe Ketron could improve the style creator, for example to give us a descent step editor inside the machine, an ability to copy/paste parts, record controller events, automations, etc. to attract the users wishing to create the styles on the keyboard itself. I tend to think that at some point the DAW will be required anyway, but for basic editing the style editor should provide everything we need to create the style as well. Its not fair however to say the the style creation process on Yamaha is a breeze like the guy on the video says. I think an ability to rename the file and use DAW for editing is really good, at least way better than on Yamaha where we have to use third-party tools (what happens if Yamaha will come up with a new style format, like SFF3 or will introduce a completely new format? ). Again I'm not telling that Ketron is good or bad, after all I haven't owned Ketron as I said before, but just mentioning that it has good and weak points just like other brands.
Last point I would like to raise is the change list of OS 1.1.0 released by Ketron, which is available for free on their site. The amount of fixes is impressive! This makes me think that they realize that the product is not fully finished and they're seriously committed to improve it. So they add new features and fix the bugs - well, maybe they'll introduce the step editor and improve the Style Editing in future, add more insert effects and provide more capabilities to their sampler - who knows. They are small company and try to compete with Yamaha and Korg which is great.
So bottom line, I do not think that this video should distract all the potential buyers from this product that has a lot of benefits, although it lags behind Yamaha and Korg in some areas...