Rewriting a small thing you know well is a fabulous way to understand the new language, because your focus isn't on "what should the code do" but "how do I make

Rewriting a small thing you know well is a fabulous way to understand the new language, because your focus isn't on "what should the code do" but "how do I make the code do this thing." I've had senior tech leadership explain that rewriting a big system into a new language is done because the real goal is to rewrite the old system that no one understands well enough and is gradually becoming scary to change; people are enthused for the shiny new language, and at the end the current organization understands this crucial system for a few more years. People in companies write the blog posts because it helps get promotions ("visibility" "industry leadership").