1. 17
  1.  

  2. 4

    I hadn’t seen rr before. There’s previous on lobste.rs:

    https://lobste.rs/search?utf8=%E2%9C%93&q=rr&what=stories&order=relevance

    And I found this a nice intro:

    https://www.youtube.com/watch?v=H4iNuufAe_8