Hi Jeremy, if you'll please pardon the the somewhat flame-y tone above -- and the Coffeescript language is 'done' so these subjects are mostly moot anyway -- my experience has suggested that:

- optional braces cause more ambiguity (manifesting as either strange parse error messages on the front side, or bugs on the back side) than is warranted by the need to write:

    rectangle { x: 10, y: 15, width: 500, height: 500 }

- newlines separating elements of a list is good, but it's really confusing to me why the following program would/should work with no comma after the "a":

    foo = (a, b, c) -> console.log a, b, c
    foo "b",
      "a"
      "r"

Plainly, it _does_ work, but to me it feels like using a hole in my sweater to scratch an itch on my elbow.