I didn't say anything about domain-specificity.

My primary point was just that SQL is old, and I think the reason it is the way it is has more to do with history and compatibility than what we'd want it to look like if we started from scratch today.

SQL is still around because it was successful. And there are reasons to value compatibility, and to avoid changing things for no reason. But my personal experience using a database without using SQL was pleasant, and I'm anxious to see the world move on to something new and improved.