Honestly, "every team in the same company having full control over what kind of stack they want to use" sounds like a nightmare. Soon you have services running

Honestly, "every team in the same company having full control over what kind of stack they want to use" sounds like a nightmare. Soon you have services running in Python, C++, Java, Go, and node.js, with five different internal libraries talking to MySQL, all slightly incompatible with each other. (Let's hope someone doesn't start up a PostgreSQL server.)