That’s true, but most Microsoft software was never ported to Alpha. Or Itanium.
So, you could get a 64-bit computer running Windows, but you wouldn’t be able to play Pinball, or read your emails, or run some other software you needed to work.
Oddly enough, the situation was much better with 64-bit Unix, where your usual tools worked flawlessly.
One of the unsung advantages of having the source available; you just need a compiler and some libraries and suddenly you have a ton of software even in an entirely new architecture.
So, you could get a 64-bit computer running Windows, but you wouldn’t be able to play Pinball, or read your emails, or run some other software you needed to work.
Oddly enough, the situation was much better with 64-bit Unix, where your usual tools worked flawlessly.