First class functions and pass-by-value have been in basically every language that was designed in the last 30 years, and have been added to most of the popular

First class functions and pass-by-value have been in basically every language that was designed in the last 30 years, and have been added to most of the popular ones that existed before that. Homoiconicity is less common, but is still present in some form in most recent languages that were originally designed to be interpreted or JIT-compiled (Python is no exception here).