Thanks. Looks neat. Will see a bit more of it. Of course the next question is, why they abandoned it, and reading this https://news.ycombinator.com/item?id=3815491 My translation of this is they had bug which came from the libs which they couldnt fix.

Maybe thid is not a showcase of 'superpower'. From what I read it took a whole summer to write in lisp and the rewrite in python took a weekend. (But will try to double check this)