I guess you just want to be argumentative.

  - You think UA is more reliable than accept-encoding? wtf.
  - I ask to show me the so-called issues with squid, and you cant.
  - You ask me to prove this isnt a BREACH mitigation implemented incorrectly - im not a CF employee. Are you?
  - OSI levels are a thing that professionals use to communicate about what we are discussing here. If you cant accept that maybe you dont belong on the discussion?
  - ask you to quote EXACTLY where it says about transfer vs content encoding, and you cant.

Reply if you feel the need, but I have no desire to try and educate the intolerable. I see this is a habit of yours from your comment history. Your user comment is apt.