Anyone ever stop to think that Yammie and the other's holding back on the technology is for a reason?
Keyboard's aren't built to last anymore. They're built as "disposable items". Yammie and other makers hold back on the technology because if they didn't who'd buy the upgrades? They all tease you with little improvements here and there, but hold just a bit for the future sales of the upgrade.
I agree 3 years in the making, the S900 could have "A LOT MORE" for a reasonable price, but if they did that who'd buy the S910, S920, and so on????
The HD would be a nice feature in the S900, but keep in mind they've added some SA voices to the new model. These SA voices alone were a HUGE marketing campaign for Yamaha with the Tyros II. You don't need a marketing degree to see adding all those features bringing the S900 closer to the Tyros II could hurt sales of Yammie flagship model.
It's like Roland shooting themselves in the foot by releasing the Juno-G while the Fantom Xa is still being sold. Those two boards are pretty darn close on the feature list.
Squeak
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GEAR: Yamaha MOXF-6, Casio MZX-500, Roland Juno-Di, M-Audio Venom, Roland RS-70, Yamaha PSR S700, M-Audio Axiom Pro-61 (Midi Controller). SOFTWARE: Mixcraft-7, PowerTracks Pro Audio 2013, Beat Thang Virtual, Dimension Le.