Many good points there. For years I have struggled with FS9 on a P4 2.4 Ghz (student economy preventing any serious hardware upgrades).
The other day I bought 2 gigs of fast Ram, an E6600 Intel Core 2 Duo, a mid range graphics card and a dedicated hard drive. I immediately cranked the sliders to the max. *laughs* I almost cried when I set down my Level-D 767 in the VC at a positively bustling O'Hare, with excellent FPS never leaving the high twenties. I couldn't even taxi the default B737 at KORD on my previous rig. I can't get into a new sim right now where people with better hardware than myself are reporting "satisfactory, I suppose" kinda performance. FS9 is smokin'. I'm going to enjoy the living shizzle out of my trusty FS9, now that I have the hardware required to experience the sim the way it was intended.
I would have felt different if the simulation of the aircraft systems had been given a notable upgrade. I will join the FSX revolution eventually. Now I just want to enjoy the moment.