I’m proposing that we switch to Bootstrap Sass / start using Sass as the default preprocessor.
Bootstrap 4 is going to be Sass. There’s not an ETA on a release, but it’s been in development for almost a year, so hopefully we’ll see an alpha soon (who knows)
There’s not really a big difference.
Our gulpfile and asset-builder already handle Sass, so nothing needs to change from a gulp or npm standpoint.
Here’s some comments from mdo via Designer News:
Popularity is a big one for me. The former seems pretty clear to me—Sass is more widely known and used. Plus, there’s more of a community (or communities) around it with all the Sass conferences and meetups. Less, not so much it seems.
Both are so similar for the most used features that I honestly don’t see too much of a debate. It’s more about build tools, processes, and dependencies I think—e.g., asset pipeline, Ruby vs C, etc.