You don't mention REPLs etc. until the very end of the article: > It definitely applies to interpreters, database-style terminal interfaces, REPLs, consoles, c

You don't mention REPLs etc. until the very end of the article: > It definitely applies to interpreters, database-style terminal interfaces, REPLs, consoles, calculators, command-lines, and other categories I've unintentionally left out. So if your article is supposed to be exclusively about those, I'd suggest you make this clear right in the beginning.