I think you should be able to understand that sqlite's "the database is a file, ONE file" is superior to getting a fully configured and setup mysql up and running in speed, ease, and simplicity. Of course, it presents limits in terms of scalability (however because it is linked into the application rather than using TCP, if you want to do 400 sql queries per page view sqlite will be MUCH faster than mysql or postgres is going to be)

And in fact Sqlite is linked with the application, so it presents a development environment much more consistent with production (if that's also using sqlite of course) than any mysql or postgres ever will.