Workflow not clear from documentation and blog article
After reading everything I still don't completely understand the workflow.

It would be good to have some docs explaining a typical workflow and interaction of designers/developers.

The examples were a bit confusing. What is the point of generating color swatches and style guide in Sketch? Same with cross-platform screens. Wouldn't it be better to just generate a webpage?

Is the idea that designers will experiment inside Sketch, and then the developers will manually implement the work from Sketch, which the designers can further use to experiment.

Is it correct that for a developer, it would be easier just to work in js and render a webpage?

I think a good way to describe it would be "a one-way sync from React to Sketch".