Darius Kazemi writing in Issue #14 of Increment magazine:
HTTP status codes are largely an accident of history. The people who came up with them didn’t plan on defining a numerical namespace that would last half a century or work its way into popular culture. You see this pattern over and over in the history of technology.
Because technology isn’t immune to historical contingency, it’s important for us as engineers to remember that long-lasting technical inflection points can occur at any time. Sometimes we know these decisions are important when we’re making them. Other times, they seem perfectly trivial.