Feels like one of those technologies where you read about it, and it seems cool/powerful and you wish you had a use case to try it out, but can never find one that you can't handle more easily without it. Am I missing some big current, real-world application?
The insurance & lending industries are built heavily on rule engines. Most mortgage origination in the US uses a rule engine. Just not a new technology folks discuss much.
No, you're not missing anything. This piece has a weird vibe, to boot.