For the entreprise users it was mostly the same as Windows 2000, a great OS released just a few months before that was much better than NT 4.
For the home users it was a move away from the old 9x kernel line and into the NT kernel line, which was infinitely better.
XP's problem was that with Longhorn's delays and then Vista sucking so much, it took until mid-2009 for a suitable replacement to appear, and by then XP was really outdated. But at the time it came out ? It was great.
> For the entreprise users it was mostly the same as Windows 2000, a great OS released just a few months before that was much better than NT 4.
Windows 2000 definitely wasn't "mostly the same" as NT 4. They were as different as Vista was to XP. 2000 and XP (pre-SP2) were very similar though.
If only all OS upgrades went that way…