DSL competition/local loop unbundling did seem to work pretty well, after a rough few years. I wonder technically how hard it would be to do this with DOCSIS 3

DSL competition/local loop unbundling did seem to work pretty well, after a rough few years. I wonder technically how hard it would be to do this with DOCSIS 3, by having channels per competing ISP. There would be a relatively small limit to the number of cable ISPs which could be overlaid on the infrastructure (5?), but that would still be preferable to what we have today.