alt Hacker NewsYes, the released, as well as final RC for 2000, were still 32bit mode.
There's a quote, possibly from Raymond Chen, about how they originally naively thought they will be able to just change size of an int, IIRC, and that backfired seriously.
That said, 64bit release of windows was supposed to happen on Alpha had Compaq not pulled the plug
After Compaq bought Tandem, they said they were going to port NonStop from MIPS to the Alpha[0], but then cancelled that for Itanium[1]. I'm not sure if NonStop was ported/expanded from 32bit to 64bit when it was running on MIPS.
[0] https://www.scmp.com/article/256948/compaq-port-himalaya-alp...
[1] https://www.informationweek.com/it-leadership/compaq-to-aban...