Isn't Node a JavaScript framework for webservers?
Well, it's mostly THE way to use Javascript (or ECMAScript if you wish), the language, on the command line.
As such, I consider it as much a platform as it also is a version of the Javascript language for the backend.
Languages ARE platforms anyway -- we never care just about their core syntax and semantics but also for all the libs stuff they come with. So Python includes batteries, and Java includes the kitchen sync.
All of which is beside the point. Those servers are (even in the documentation) not suggested to be used in production. And they are not.
Whereas Go's server serves thousands of requests per second in large deployments already.
The only other I know of is perhaps Node.
So, yes, seriously.