And without the adult supervision that "ALTER TABLE" theoretically implies, you end up with 15 columns named "t1" and the like, no idea what any of it means, an

And without the adult supervision that "ALTER TABLE" theoretically implies, you end up with 15 columns named "t1" and the like, no idea what any of it means, and source code to match (assuming its not gone and you're trying to reverse engineer the schema-less data) There is a place for unorganized, disorganized, unengineered, unplanned data structures, but its not in the DB.