It would be a lot more constructive if you reported a bunch of corner cases where this doesn't work rather than just dismissing this as a toy.

No, I don't dismiss anything.

It's just, I'd rather play with my own toys instead of using someone else's toy. Especially since I don't think it would ever grow up to be something more than a toy.

For serious work, I'd use some widely used, well-maintained, and battle-tested library instead of my or someone else's toy.