I think I will, for several reasons.
The first reason is that it's always good to have a full OS disc for when Windows fails. I have one, but having more to fall back on never hurt anyone.
The big one, though, is that I want to assemble a cheap machine, and use it as a first line of defense: When I want to download something I'm not sure about, I'll put it on the cheap box If it doesn't crash it, I put it on my computer. To do that, though, I'd need another OS Disc. I'm not sure, but I think we've been upgrading since Windows 3.1. At least, our only Win95 disc is an Upgrade. :-/