Comment by dricornelius

I always wanted something like that too. I just yearned for rapid constructive feedback from individuals with subject matter expertise, interest, and time, rather than waiting 6 months for a response from people without one or more of those things, then having to relay comms through the editor middle-person. What you mention could make a nice arXiv-Reddit joint venture... or SciRate or Fermats Library fills the void _ prayer hands_