Greenspun's tenth rule of programming is an aphorism in computer programming and especially programming language circles that states:[1][2]

Any sufficiently complicated C or Fortran program contains an ad hoc, informally-specified, bug-ridden, slow implementation of half of Common Lisp.

Maybe we should one day include Golang or Rust to it

https://en.wikipedia.org/wiki/Greenspun%27s_tenth_rule

Greenspun's tenth rule was formulated in a time before things like first-class functions were commonplace in industrial languages. Rust supports not just functional programming idioms but outright Scheme-style macros, it's out of scope for Greenspun's.