A few days ago I tested an interesting alternative to Bedrock, called Fractal.
It’s more of a component style guide that can be added to any project than a prototyping tool, but there are a lot of similarities.
It builds on a lot of similar ideas as Bedrock, so me this is a validation that what we are doing here is right.
Then why not build on top of it? Less duplication.
@Wim: there’s a variety of reasons. But this is a blog post in itself 🙂