I've seen excessively clever Java. Instead of code which did what was wanted using POJOs, it acted as an interpreter with most of the business logic in config

I've seen excessively clever Java. Instead of code which did what was wanted using POJOs, it acted as an interpreter with most of the business logic in configuration files, which eventually numbered hundreds and had to be generated by shell scripts. I avoid cleverness, including when writing Lisp. I rarely use macros, for example. Even if no one else reads my code, I'll still have to understand how it works in future.