Netflix might be having 20000 TV-episodes and 3000 movies, but they are not evenly viewed. I bet that a caching box with even a mere 1TB disk could cover 90% of the usage.
If 10000 viewers want to see the latest House of Cards, there is no need for sending 10000 streams from one ISP to another.

Heck, even some sort of bittorrent could be used, if each viewer would allocate say 50GB for shared content.

I have a thin adsl from one ISP and a 4G to another, and a traceroute to netflix leads to two different servers, each in my country, Denmark. The adsl is even only 3 hops away.

BTW: Why do I have to type <br> to have line breaks? Why not just enter enter?

The little guy may be right. However, so is the pedestrian wanting to cross at a pedestrian crossing. It doesn't help having the right of way, if the 18-wheeler doesn't want to obey the rules. Leif