What you say may be true: ARMs may no longer be the best processors for a desktop machine. However, I think your assertion that "RISC OS is tied to hardware that isn't designed for the use that it's being put to" is a curious thing to say, given that the ARM chip, in effect, was designed precisely for the purpose of running RISC OS
I'd have thought It's one of the few examples of OS and processor that were each specifically designed from the ground up for use with the other.
As for the poll, it will be interesting to compare the different machine usage statistics of Archive compared to drobe. I'm really very surprised that the original suggestion of the Archive poll on usenet caused so much controversy. The reasoning behind it does not really seem *that* unsound to me!