When is it a good idea to not use NodeJs? Why?

When is it a good idea to not use NodeJs? Why? 
 
Because:
 

 

 

* If we want to create an application which is not much need OS  

server/user,Then we shouldn't use Nodejs. 

We would be just fine with other technology in very less time.

 

 * If we want to make an application which is required CPU Operations 

 frequently,Then we shouldn't use nodejs, Beacuse Nodejs bynature 

single threaded. When we launch a node process, you are running  

a single process with a single thread on a single core. So your 

 code will not be executed in parallel.

 So long running CPU tasks will block the whole server and are 

 usually a bad idea.

 

 

* If we are going to create a Simple blogs and static sites or Just 

 as a static file server then we shouldn't use Nodejs.

 

* No ability to scale out to take advantage of the multiple cores.

* Every time using a callback end up with tons of nested callbacks. 

 So using so many callbacks is not a good idea.