[davidwparker]

Yes, it's very much in beta! And if that's a concern for you, then I'd stick with Sapper or Elder.js or another.

That said, I think the replies covered the concern pretty well. For me, I don't really have any concerns with it. I don't find it very opinionated nor restrictive, but I come from a Rails background where I'm used to convention over configuration, so maybe I'm biased towards reasonable defaults.