This is something that has always bothered me, internet bandwidth only takes up a small amount of spectrum in place of channels and the cable companies could cut lots of channels and improve broadband dramatically. The days of someone dictating what you watch and at what time are over, why all the spectrum hoarding.
Even when I got my first broadband cable connection, one of the first on the node in Chandler in 1996, the cable guy said it only used the space of 2 channels for internet data and the rest for broadcast/cable channels.