My plan is to use 32-bit Windows XP Home with SP3 for life, and I was wondering which users still use Windows 9x or ME as their only OS and plan to do the same? If so, is buying compatible hardware a challenge for you? The challenges are hardware support (motherboard chipset) and no anti-virus support. The older the OS gets, the harder it becomes to maintain. The reasons XP is my last OS: 1. Microsoft makes so little improvements to each Windows OS, it doesn't pay to switch unless you need an improvement. 2. Windows is so bloated, poorly designed, maintained, and behind the times. 3. It takes years to learn an OS, and the time and desire just isn't there to ever do it again. 4. Legacy hardware is cheaper and much more stable. 5. I spent seven years learning software and hardware to get XP spic-and-span clean, and performance is through the roof. (I can go over two years without a reboot, and did just to see how stable XP really is. I would've kept going but didn't want to risk a hardware failure and shut down the system for maintenance.) 6. I know my system like second nature and using, managing, and repairing it is a snap.