A basic HD cable package on top of my old Comcast Internet subscription added MAYBE $20 to the cost of my Internet plan due to the bundle discount. Oh, and Comcast threw in HBO for free, which is worth about $15 a month.

To get the equivalent channel access as such a service, you've got to pay for YouTube TV or PlayStation Vue or the like, and you're looking at $40 a month there.

Obviously, prices vary by where you are, but in a lot of cases, cord cutting actually removes efficiency. And note that Netflix is rapidly abandoning the "buy all content" model in favor of just having it's own shows. So you'll need Netflix + Hulu + CBS All Access + Disney's new service, etc.