Yeah, those old 1960's shows ran 51 minutes (if they were a 1 hour program). Now it is 42 minutes for a standard 1 hour program. The problem is there are too many channels. These channels need to be consolidated. Even channels like TCM, with a few GREAT shows have only a few great shows; the rest of the channel is dog crap. So you have 30 hours of decent programming a year and the rest is zero ratings filler garbage.
Close down the channel space, toss everything with low ratings and put that bandwidth to HSI...problem solved, yay. Then shows like The Walking Dead just get sold to USA or another major network instead of every network each getting 1 or 2 decent shows and the rest poopy.
That's the thing, they don't get ratings. Many of these channels rely on channel welfare (they're packaged by the channel owners like Disney) so MSOs are forced to take them in order to get the 1 channel that does get ratings.