It would be really cool to load duckdb files too. sql.js-httpvfs seems convenient because it works on everything in database so you don't have to create indexes, or setup keys and constraints in the client.
There was neat post https://news.ycombinator.com/item?id=27016630 a while ago about about using sqlite on static pages with large datasets that wouldn't have to be loaded entirely. Does duckdb do something similar with arrow/parquet files or its own format?