You rebut the author by reiterating arguments he already addressed in his post ("most people don't like it", "only typewriters need it", plus a consistency point he didn't address). Do you feel his rebuttals to those arguments were insufficient? What do you think of the concrete benefit he suggested of two-spacing in vim?
That's easy: how you write your prose or your code should not be dictated by the limitations of your tools. Tools are tools and must satisfy their user's needs. That's the whole point of a tool. If a tool doesn't satisfy your needs and you can't modify it you must find another one.
It's going to be hard if you are emotionally attached to that tool, though.
