Hi Jérémie Croyère. When it comes to building "products", note that we're working on the next version of the Frames feature, which adds a backend with functions and a DB. So you'll be able to use Dust to directly create and run those Apps. We're already using this internally for some workflows that used to be done externally to Dust, and it's been working quite well.
I know it's not exactly what you are asking, but I thought I'd share that nonetheless! 🙂