Can you help me find it? It presents a typical situation like:

• I love LOtR (or something else)
• what’s that?
• You never watched LOtR? It’s impossible. How could it be? Etc etd
  Then it goes through the mathematics of the rate of discovering things through your lifetime to prove that even if something is popular, it’s not unreasonable to be discovered by someone new. And it concludes that situation like those should be a moment of joy and excitement that you are witnessing someone discovering new great art.

Sounds familiar? Please help me find it.