Moving to Linux
For one thing, part of the reason we have as much malware as we do may be that there's one predominant operating system, so it pays to figure out ways to exploit it. Sure, some operating systems seem more bullet-proof than others, but having one main target for malware writers, no matter whether it's Linux, Mac's OS X, or Windows, seems like risky business. Spreading people more uniformly around the major operating systems and then providing data interchangeability (e.g., exchanging data through adhered-to standards for XML or plain text) seems like a more robust solution.
For another, you may have certain programs you need to run that only run on one or the other operating system. I can think of one or two major programs I need to run that require Windows.
Still, if you've been using one operating system for a while, you may not know what exists elsewhere. That's why it's good to see LinuxLinks' list of Linux alternatives to popular Windows programs. While it's missing major programs I use (most of which are available on all three major operating systems), it may help some of you. Thanks to RootPrompt.org for the tip.