Well, the usual "reasoning" is that Go is easier to maintain, faster, will require less hardware, etc... all of those things might be true. What is not told in is the other side of the story, the one where you will have to write, test, document and maintain a TON more code... which usually ends up in just overall lower quality as it is pretty hard to find developers writing better code than the code you usually find in popular full stack frameworks.

But managers/directors, etc aren't idiots. They swallow it and they accept it even if they know the trade offs, because what's not told here is that if management says "No, that's madness" then people quit, and that's worse. So there we go with our super performant microservices for our 10 reqs/s app.