[sheepmullet]

> In the expressjs example, I wonder how practical is to do all that interop instead of just using plain JS?

It depends. Interop in clojurescript isn't any more difficult than using plain JS but if your code is very interop heavy I don't think you gain a lot by using Clojurescript.

For a web application though interop code is going to be a tiny fraction of the overall code.