Ha - the double y-axis story is exactly why I want to get it right. Better to build it in properly than bolt it on later.

"Data science/data journalism" is a great way to frame the target audience. Clean defaults, sensible design, fast enough that the tool disappears and you just see the data.

And yeah, graphviz keeps coming up in this thread - clearly a gap in the ecosystem. Might be a future project, but want to nail the 2D charting story first and foremost.

Thanks for the thoughtful feedback - this is exactly the kind of input that shapes the roadmap.

Gratifying that it's still useful.

A lot of improvements are possible, based on 20 years of progress in interactive systems, and just overall computing performance.