I mean, at least three orders of magnitude, minimum.
It's just a ludicrous argument. SQLite is fine for a file format, and in very specific dumb CRUD scenarios it's just about ok. But it's not worth sticking with if you need anything interesting over any volume of data, far far far below what would warrant a different DB tech to rdbms.
Ironically, you're more representative of the "we'll need Hadoop" crowd.