Sorry, my comment was probably a bit flippant, and I meant no disrespect to LESS as a technology or a choice. There's nothing
wrong with LESS..
That said, the major CSS frameworks that I am familiar with (Foundation, Bootstrap, Bourbon, etc) all seem to be choosing SASS, so it feels like it is becoming the de-facto standard..
I'm sure there are lots of excellent and well-supported products that still use LESS though.