People who voted CPU-only haven't been around long enough or aren't tech savvy enough to appreciate the power of botnets.

I don't have a GPU farm so I'd love CPU only to be viable and fair for the masses, but unless you have some genius innovation to nullify botnets, its a pipe dream.

All we can do is fire up some cloud servers for a few hours and hope to do battle with the botnets until it becomes unrealistic. That's not particularly fair for anyone with a single CPU home computer though..