In fact, I am currently using Windows 2000 Professional on this computer.
As am I.
I prefer the gui and am able to find things (for tweaking system settings, etc.) much easier than XP or anything later.
XP, and the later releases are not so much “operating systems” as they are “media presentation software”.
Problem is Flash and Java have dropped support for W2K, so I’m running the latest versions of both that are still compatible, and get bit often by webpages telling me my Flash is out of date.
You and I have similar problems. My browser is Mozilla Firefox and I get frequent requests to upgrade my OS so Firefox can be upgraded. I intend to keep milking this old OS as long as possible. I have a very nice laptop and I believe that the OS is Windows 7. Don't like it and, as you say, it is better described as a "presentation" system.