I have “upgraded” to 64, but I need to install a 32 bit operating system. There are a LOT of drivers that aren’t compatible with 64 bit windows seven. If you want to run random hardware (auto scanners, older wireless cards that support monitor mode, reflash your old magellean GPS via USB, old ass printers, usb-to-WHATEVER converter cables) 64 bit blows hard. My old POS gateway with a broken HDD, under 500 mb ram, XP, and a Pentium 3 processor runs these obscure hardwares more so than my new dell!!!
Only highly intense operations (calculations or graphics) need to make use of the extra registers. Most of these programs are compiled as 32 bit applications, so they won’t make use of them anyway. Who the hell needs over 4GB ram anyway.
EDIT: Before anyone says shit, YES I have tried compatibility mode. It works for some things, but not others.