The express router array is pretty easy to abuse, it's true. For example, as something you probably shouldn't ever do:

https://www.exratione.com/2013/03/nodejs-abusing-express-3-t...

I guess the Netflix situation is one of those that doesn't occur in most common usage; certainly dynamically updating the routes in live processes versus just redeploying the process containers hadn't occurred to me as a way to go.