When working on projects that have back-end and front-end teams separated and the back-end is not using NodeJS, I often see front-end guys having a “brilliant” idea to add a NodeJS component somewhere in between, either for the “performance scale-up” or “this is so easy and intuitive to do certain things in NodeJS”.

In a conventional CRUD, monolith application, adding NodeJS to the backend is actually bringing more harm than good in my opinion:

   - add another language/framework that the back-end team needs to master
   - performance bottleneck is usually not in the webserver. Often the 
     database is the bottleneck
   - maintaining a proxy/dispatcher just adds more complexity to handle when errors happen.

Love to hear your thoughts and experiences here.