"To make a system sufficiently configurable, you end up having to re-invent a turing complete language inside it's configuration files" This sums it up perfect

"To make a system sufficiently configurable, you end up having to re-invent a turing complete language inside it's configuration files" This sums it up perfectly, I've had clients say 'oh and it has to be 100% customisable' and I've been like 'it is, it's called HTML, CSS and js'