Cats live in the world somewhere between code and data

This version incorporates HN feedback from earlier A-B testing article aimed at the FP community. Mainstream programmers don't really care all that much about FP. It's pretty clear to me now that Cats and FP serve different markets anyway

Earlier version here (I think the article is now flagged anyway) but such is the nature of the interwebs that only controversial articles get attention https://news.ycombinator.com/item?id=31957194