Ok, most people who are on W2K or it's variant XP, like myself have been on either W95/98 or Mill, and I have not heard of a single one reverting back. Now if that don't answer you question arthub I'm a Dutch man. I've had W95 and W98se, and the day I installed W2K Pro was the day I stepped out of the darkness into the light,I kicked myself I had not done it earlier.
From a user point of view it looks and feels like the Win98/Mill interface, so don't worry in that regard, only differance you will notice is it is a fantasticly stable OS after using W98se [I'm talking from my own experiance of W2K Pro here]
W2K Pro is the most secure OS Microsoft have, and thats official. And if you install Goback or Goback Deluxe, which incidently makes XP's 'System Restore' look like a one legged man in a two legged race, see my web page
http://www.tonysugrue.co.uk/ your onto a winner. [Goback can be put on a XP machine no prob]
Look Lona and arthub, get a grip on reality, and stop acting like a couple of luddites :tony: you'll thank me for being so blunt, honest you will.

arthub, you have XP then load the bloody thing, and Lona you have friends "cough" so get on with it.
If your systems ain't got a CD-RW then buy one, they are a must. Back up all personal data, photos whatever, and walk into the light
Got to go,it's 'tinker time' Parcel Force are here with a hard drive I ordered from Dabs.com early yesterday, not bad seeing as I did not pay for premium nexy day delivery.