It has an extremely low barrier of entry while providing the features of a relational database when all you need is a local data store. The files are trivially

It has an extremely low barrier of entry while providing the features of a relational database when all you need is a local data store. The files are trivially easy to transport using standard tools when needed. I've been in back-end automation/integration for my entire career and use these kinds of things all the time. The overhead of maintaining a full networked RDBMS isn't always something I want (or need) to do.