This is amazing work. I've always wanted to be able to make visualizations straight from a SQL REPL. I've been thinking about building something sort of like this with Perspective[1] + DuckDB. Perspective would give an interactive chart (and/or wicked datagrid), and using a Perspective virtual server, you could feed filter + pivot conditions in the UI back to the database query. Maybe this is the kick I need to get this out of ideation.

[1]: https://perspective-dev.github.io/