Oh I could not go back to Win2K.
It was fine as a backup computer, it's primary purpose was for the immunization program, which could not be moved forward and is no longer supported. Still, it worked, sorry to see it go.
There were many more changes "under the hood" than just what James stated,
Win2K was the base of the future OS's, but then VW Bug was the base for the Porsche 911. We always want more. We just don't want to pay for the improvements
.
