Not really sure how a user review that points out issues qualifies as ‘publicity’, I rather feel that is the purview of the manufacturer.
But I can assure you, most of the angst you hear over at Korgforums is people that REALLY want a PA5x but having been informed of the bugs and issues that matter enough to be a dealbreaker are denied getting one until the issues are fixed.
You can definitely count me amongst those who would NOT buy a product no matter how much I want one if there are issues that would prevent me using it the way I want (and that worked fine the previous model). But then again, I’m looking for a professional product for professional users, who can’t afford to wait while essential features slowly (glacially!) get added back to the OS.
If you don’t like criticism of a product that meets your needs, put yourself in the shoes of someone that it doesn’t fit their needs until finished, and see how you’d feel then…
As to forum participation, the forum is open at all times to discussions about anything related to arrangers. If you fail to come up with anything yourself, you are hardly in a position to criticize those that still do post about arrangers. There are plenty of other forums for discussing electric pianos, organs, furniture, bikes, whatever. But forum participation depends on the members. If the content isn’t what you want, be a part of the solution.
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An arranger is just a tool. What matters is what you build with it..!