I read this somewhere. Since i didn't find it anymore and don't remember all the advantages aside from concurrence (don't have to unpack a zip archive) i asked chatgpt:

Using SQLite instead of ZIP for office formats can offer several advantages, particularly in terms of data management, performance, and functionality. Here are some key benefits:

1. Structured Data Storage: SQLite is a relational database management system, which means it can store data in a structured format with relationships between different data entities. This allows for more complex data queries and relationships compared to a flat ZIP file structure.
   Query Capabilities: With SQLite, you can use SQL queries to retrieve and manipulate data efficiently. This is particularly useful for applications that require complex data retrieval, filtering, and aggregation, which would be cumbersome with a ZIP file.
   Integration with Other Tools: SQLite can be easily integrated with various programming languages and tools, making it a versatile choice for applications that require data storage and manipulation.

3. Concurrency: SQLite supports multiple readers and a single writer, allowing for better concurrency when accessing and modifying data. This can be beneficial in collaborative environments where multiple users may need to access or update the data simultaneously.

4. Data Integrity: SQLite provides features like transactions, which ensure that a series of operations either complete successfully or leave the database unchanged. This helps maintain data integrity, especially in scenarios where multiple operations are performed.

5. Ease of Updates: Updating specific pieces of data in an SQLite database can be more efficient than modifying a ZIP file, which may require decompressing, altering, and recompressing the entire file.

6. Reduced File Size: While ZIP files compress data, SQLite can store data in a more compact format, especially for structured data. This can lead to smaller file sizes for certain types of data. Built-in Data Types: SQLite supports various data types (e.g., INTEGER, TEXT, BLOB), which can be beneficial for storing different kinds of data in a more organized manner compared to the generic binary format of ZIP files.

9. Versioning and History: SQLite can be used to implement versioning and history tracking for documents, allowing users to maintain a history of changes and revert to previous versions if necessary.

I put related points together. One point was moot, removed.