I forgot about that. Windows NT 3.5 and I think 4.0 were ported to the DEC Alpha CPU architecture and shipped on a number of (very expensive) DEC workstations at the time. So it is not totally nuts to possibly port it to the then-current Apple/Motorola PowerPC architecture as well.
I thought there once was a Windows NT version for PowerPC, but it was never released, or was pulled short after release.
Never seen it in action though.
It was released; in fact, I actually have a Windows NT 4.0 CD that has a PowerPC version on the disk, alongside an x86 version.
But short-lived. First was NT 3.51, and it did not even make it to NT4 SP3.