why is javascript node.js not on google app engine

Question

Google created the V8 JavaScript engine: V8 compiles JavaScript source code directly into machine code when it is first executed.

Node.js is built on V8 - why is Goo

Answer 1

It has been released as of March 2016.

https://cloudplatform.googleblog.com/2016/03/Node.js-on-Google-App-Engine-goes-beta.html