This is part of an argument that an in-process, single-file, zero-admin SQL database is a completely different animal from an interface to SQL database servers, and deserves its own API, though it should not be *gratuituously* different. The existence of sql-de-lite and APSW (Python) seemed to confirm this. Once you exclude the proprietary, the JVM, and the .NET databases, only SQLite and Firebird Embedded are left, and SQLite is far more lightweight.
My actual pre-SRFI isn't particularly SQLite-specific, but it's what I think of as the MVP; other SQLite-specific features can be added in a later SRFI. If it's useful as a skeleton for a general database server API, that's certainly a Good Thing.