After the extremely poor sales for the PSR 9000 Pro, I'm sure Yamaha will be slow to go down that failed road ever again.
The 9000 Pro was a great concept that was very poorly executed (an understatement). It was essentially a PSR 9000, MU100R, and a castrated A3000 sampler all thrown into a very well built heavy case with a great semi weighted keyboard but with horrible integration of the sound sources. The PLG sound slots were never well implemented and no matter how much Yamaha said they were going to better incorporate them, that never happened. In addition the 9000 Pro was plagued by a very slow internal processor that when overtaxed, would cause MIDI, timing, sequencer sync, and polyphony issues. Not since the early days of EMU, Kurzweil, and Ensoniq have I ever seen such a basket case for such an expensive keyboard/arranger/workstation.
I was probably one of the few people who had purchased a 9000 Pro and it was a major disappointment to me. The key feel, build quality, and many of the sounds were great, but the software and internal processor were so plagued with problems Yamaha eventually dropped all support for the 9000 Pro and discontinued it. Had Yamaha used a faster CPU, had better PLG integration, not castrated the sampler section, and done software improvements, the 9000 Pro could have done quite well.
I was also soured by Yamaha's customer support, or lack thereof, for the 9000 Pro and will likely never buy another Yamaha product because of their lack of support and lack of integrity. Mark Anderson himself personally told me Yamaha was working on fixes for the 9000 Pro and that never happened. It didn't show much integrity on Mr. Anderson's part or Yamaha's part when they discontinued all support for the 9000 Pro. They threw the baby out with the bath water!