Definitely agree. We each have to assess the capabilities in terms of our own personal needs. Gary has a great system going and I salute him for addressing his needs. I don't use lyrics or harmony and am excited about the potential the SX900 offers for my needs.
IMO, Korg still has the best system or at least the one I prefer. But honestly, the new Yamaha system probably has the potential to be the most comprehensive system out there. You can have 8 or ten (with Genos) registrations per song so that is a lot of power. Most of the time though, I personally would not need it. But I can see how Gary's system could work very well.