Hmm. Itanium was introduced in 2001. Opteron was introduced in 2003.
Yes, I know there were >32 bit processors out before that (I have very fond memories of working with CDC's 60bit machines), but that's not the context here.
In fact, looking back, what's astonishing is how fast 32bitness fell to the wayside. I was supporting both 16bit and 32bit machines into the early or mid 1990s before we were finally able to say No More to 16bit architectures.