Instability? Rot? Hardly!
I don't know if anyone still reads this thread.. but..
I have been using Vista 64U, as in my sig, for just about 2 years now.
My computer is on 24/7, connected to two other computers via LAN, with constant communications and transfers between them.
My computer is constantly connected to torrents and ftp sites, sending/receiving data, 24/7, on average over 10GB a day, sometimes up to 50GB in a single day.
My computer is also used as an entertainment system, I watch on average 3 hours of divx/dvd a day, as I don't watch TV at all, this is my only form of visual entertainment.
My computer is also my main window to the web, so I use it for hours every day surfing the web. I throttle my torrents uplink to 90% while I surf so that it doesn't interfere.
I also play games occasionally, perhaps 10 hours a week.
My computer is by no means minimalist. While I constantly check for spyware and unwanted processes, I run Google desktop, Objectdock64, O&O automatic defrag, utorrent, MSN, Skype, Daemon Tools, as well as all drivers for my peripherals at all times.
All this activity, and I only reset my computer once a week, sometimes I forget and it goes for weeks at a time. I reset not because the system is unstable but only because I want to give it a breather.
So, I am not sure where all this talk about instability is coming from, not only does my OS not "rot" over time, it doesn't even slow down after being on and constantly used for weeks at a time.
My point! If Win7 improves on Vista64, I can only imagine the ultra stability, even tho it is very hard considering the incredible stability of Vista as it is. XP, as much of a fan as I am, never came close to Vista in this matter.