Ask HN: Is there every a good reason to create a 1GB+ JSON file?

From time to time, I see attempts to serialize huge JSON objects to files, and in every instance, it seems like a code smell. Today, I encountered a file that made the 1GB figure look like a joke (it was much bigger than 1GB). Has anyone else found themselves working with files like this (especially JSON, but would be interested to here stories involving other serialization formats. Media files excluded)?