That's an unrelated problem. Developing your systems interactively, instead of reimplementing them over and over again produces the same results, just faster. I

That's an unrelated problem. Developing your systems interactively, instead of reimplementing them over and over again produces the same results, just faster. If your servers aren't ephemeral, or you only have "one machine", or if you don't know about heartbleed patching, then you're going to be fucked anyway.