Windows 2000 was originally intended to be that. While the official switchover got pushed back (ultimately to XP) that made 2K an extremely capable consumer OS.
Yeah W2K was an oddity that way. I wasn't sure how to fit it in this. But TBH, it wasn't as well adopted as ME or XP and I didn't feel the need to wedge it in there. The point stands, with or without W2K in the mix.