Well, I wouldn't be surprised if it was true. As I see it at least in Russia, people mostly buy keyboards like PSR-S670 or cheaper. So what's the point of producing new items of a keyboard, which doesn't sell well?
While I respect E-A7 for being designed for professional use, as I respect musicians making this choice, personally I still find it really hard to justify choosing it over S670 which is half the price.
Not many understand the Ea7..... The 670 doesn't even come close to what the EA7 can do features wise ... the Ea7 is the best bang for the buck bar none. Imo.