Sorry but there is no information in the post to justify that using C or assembly is more simple than using python, ruby or clojure. There is also no justification as to why making the code in a library or server simple would result in more complexity down the road. Having written servers, applications and libraries before, I'm left to wonder why making their codebase simpler would result in more complexity down the line. Also I wonder if complexity is being confused with (expressive) power. Simplicity is always a good thing. Lack of others things might not be. The trade-off is usually between simplicity and thought+work put into something. Not functionality/power and simplicity. The shortcut often taken is making things more complicated to make them more powerful without making the effort necessary to make them simple.