Why are the Yamaha fanboys always so anxious to see a new Roland, yet the Roland users are, on the whole, pretty content with what they have?

Yamaha users were in a tizzy for a year before the T3, and we already see rumblings for a new S9xx series. What is it about these things that fails to satisfy for any length of time?

Me, I'm in NO rush for anything new, after having got basically a new G70 for FREE with the OS3 update... October 2006 was the OS3 launch, so my G70 is only two years old... I'm supposed to upgrade it faster than THAT, Ian?