Thanks, I'll dig into that post later! I think what I don't get is a mental model of what they do, and how that maps onto problems I write code to solve. It's

Thanks, I'll dig into that post later! I think what I don't get is a mental model of what they do, and how that maps onto problems I write code to solve. It's possible it's just that s-expressions are good at solving a problem I don't have and don't really understand.