[chousuke]

I like it just because it's a single file (most of the time). I can put pretty much anything in it without having to think about how to store data on disk in a sane manner, and SQLite can handle a lot of data. You get so many good things for free: transactionality, durability, concurrent access, and an easy consistent backup mechanism.

Even if JSON blobs happen to be the most convenient way to represent your data, you can still just put those blobs in an SQLite database and maybe worry about converting them into something relational later.