Don't take my word for it but IIRC structs are implemented as maps with a __struct__ key with the struct name, and that's used to implement checks and balances

Don't take my word for it but IIRC structs are implemented as maps with a __struct__ key with the struct name, and that's used to implement checks and balances at different levels of compilation, linting and so on. In practice I find that I hardly ever need to think about things like this. A few times I've done macro expansion to peek under the hood and figure something out but that's partially Lisp damage, I could probably just as well have read some documentation.