There are tons of industrial knitting machines out there, check Alibaba. A home knitting machine that was the equivalent of a C&C machine for knits would be pretty rad. I'd use it all the time.

The reality, last I looked, is that the gap is pretty large -- the industrial machines are very feature specific "25 sizes of socks in up to 10 yarn weights!" and the home knitting machines are for hobbyists, full stop.