What If OpenDocument Used SQLite?

If I remember correctly Mendix project file format is simply a sqlite db. I thought the designer was lazy but it turns out it's a reasonable decision.

Recently, DuckDB team raise similar question on DataLake catalog format. Why not just use SQL database for that ? It's simpler and more efficient as well.

With regard to DuckDB catalogs, I think a database is preferred for that. In particular, the tutorials assume PostGres.