Compaq dropped the bombshell about canceling Alpha just before Win2k RTM, surprising both Microsoft team involved and Compaq-side team.

Microsoft continued to use 2000 on Alpha to work out bugs in 64bit support since it was the only 64bit platform they had supported that had operational hardware (support for PPC was only for 32bit), making it important bit in support of Itanium and soon later amd64 ports.

Some of the details made for Alpha support (including extended support for software like FX!32) are now backbone of x86-on-ARM support in windows ARM builds