Did you actually read my post before replying? I much prefer to be able to, if necessary, work with the tools in my build process at a code level. I don't enjoy working with tools I don't have mastery over wherever possible (pgsql is a stretch, but I can hack on nginx, Play, LESS, and Redis without much difficulty).

I have on occasion had reasons to be mucking around in the LESS codebase. I cannot do that with SASS (well, I could, but I'd have to use Ruby and that's a non-starter for me).