'98 is slow and buggy as far as newer 3d software is concerned. It's also a lot more "hackable" OS and more vulnerable if you're online 24/7 like with a cable modem. While 98 is a good OS overall, and I do have it on secondary machines, I prefer Win2k lately, as it blazes through my Bryce and Poser renders compared to '98 on the same machine.