I've found that this is a really nice "feature" of Clojure, and maybe other Lisps. Most libraries are very small and tend to all speak in terms of the same de facto standard interfaces (functions, seqs, hash maps, vectors, etc.) so they can be easily composed. Trying to fit together Java or C# libraries like this is basically impossible without some mediating standard base classes or interfaces.

I did originally, but I wanted more control on how middleware gets wrapped around the app, as well as the ability to have dev and production "modes". Each of these adjusts what middleware goes into the stack and how it reacts.

I also wonder if this isn't a result of using a Lisp. In Node.js you see an absurd proliferation of libraries that do essentially the same thing but provide slightly different syntax. In Lisp you can reuse an existing library, provide your own surface syntax and not incur any overhead.