Looks like a good addition to the datasette ecosystem. I have been working on a similar idea with cusom html around sqlite databases. By default a faceted search interface is generated but by reusing the client side data layer, custom apps are made easy.

The design keeps data and presentation together and even maps do not rely on external services.

I have called it Pihka: https://ghentcdh.github.io/Pihka/ https://github.com/GhentCDH/Pihka