How relevant is it to learn Sass (scss), secondly and based on the responses which framework is better - Bourbon or Compass?

Question

Should I learn Sass?

Answer 1

The killer feature of sass/scss is in my opinion the ability to define variables, and being able to manipulate colors on the fly (darken color x by 20%, for example).
It's not enough of a reason for me to use it, because on the other hand it makes debugging CSS a bit of a nightmare at times.

That being said I've never worked on crazy, thousands-of-lines stylesheets, and I understand why sass/scss is may be more useful in business applications with multiple people working on styles. Companies use it a lot so it's not a bad idea to learn it regardless of whether you like it or not, plus it isn't too hard anyway.