Isn’t there a couple of year gap between SX and Genos releases? The SX900 came out two years after the original Genos (and had a few things like the multi-part chord sequencer which was subsequently added to the Genos in an update).

It seems reasonable to infer that Yamaha might wait the same two years before they trickle down features that have only just appeared in the Genos2. To do it now would undoubtedly cut into Genos2 sales…