When you cross service boundaries, those globals get reset. I don't know how to say this exactly, but sometimes you're writing crappy code in a crappy language

When you cross service boundaries, those globals get reset. I don't know how to say this exactly, but sometimes you're writing crappy code in a crappy language (Java), and nothing matters more than doing it quickly and integration-testing it. Worst case your code becomes such spaghetti that someone rewrites it, which is fine cause it's self-contained.