Well on the TV side, Friends, for example. Netflix is coughing up $100M to keep it for another year because people are flipping their lids about losing it. Also, you're taking the definition of "classic" far too literally. There's any number of movies from the 80s, 90s, 00s, etc. that Netflix just doesn't have or shuffle in and out of the service within a matter of months that are of far greater appeal than something Netflix cooked up in the span of six months. That's the difference between "lots of content" and "lots of content that people want to see."
> I think more people want to watch "Thor: Ragnarok"
Again, say bye-bye to that one in the near future when Disney's streaming service starts, and in its place we'll get some Netflix junk that no one's ever heard of. See the problem here?