I just don't have any compelling need to run on W2K, so any amount of overhead to make my stuff work on it is rather pointless. OTOH, having W2K around for temporary use is handy, typically it's in a VM and takes all of 5 minutes to gin up a new copy. And since W2K is all that runs on my old laptop, it does just fine for websurfing and such.
It's also worth noting that the first thing I do with a new XP or Win7 installation, is brain-damage the GUI back into basic/classic mode, so that it looks like the default W2K interface. It's still the best one out there, and I include OS-X, Linux, and any other versions of Windows in that assessment. W2K got a lot of things right.
Sounds right... Most things still work from Win2000 days. If others require it, then upgrade. It is as simple as that.
Like your brain damaged comment... I do the same...heh.