Burkels..., so OS upgrades are just for fixing bugs huh? Yamaha's OS upgrades don't add any real useful features to the OS.. You want that.., well you have to buy the next model. Korg and Roland fix bugs with OS updates, but they also add useful features. Show me a point in Yamaha's Tyros history where they took a top end feature on the Tyros and gave it to the semi-pro model as an OS upgrade? S-900 owners got the SA voices, but that wasn't free now was it?

I can't wait until Korg releases this next OS update. I can't wait for someone to compare what Korg did with an OS update that didn't require PA owners to upgrade their keyboard to the next model.