I believe the complexity comes inevitably with code reuse and abstraction. Once you've got your ethernet driver working, you discover that your routable point-t

I believe the complexity comes inevitably with code reuse and abstraction. Once you've got your ethernet driver working, you discover that your routable point-to-point packet exchange is useful in many places, so you extract an IP component, and before long, you're writing web applications in a high-level framework in a dynamic programming language again.