Pro Currently going through an upgrade
Roots is currently in the process examining how to leverage newer technologies to make Roots even better. You can see the new project on github: https://github.com/carrot/roots-mini
Here is the blog post explaining the next phase of Roots: https://medium.com/@jescalan/eaa10c75eb22#.uacjziaej
Here is the stack they're experimenting with:
- jade - for markup - babel - for JS and JS transforms - postcss - for CSS transforms - webpack - as the core compiler
As this is a work in process, it just means the future of Roots continues to look great.