The benefit to programs that don't use threading and use event loop and shared nothing multi-process is that they don't have the overhead when things are maxed out.

This is why virtually every high performance server (nginx, redis, memcached, etc) is written this way and things like varnish (thread per request) are multiples or orders of magnitude slower.

Funny people criticizing nodejs for using the same architecture that all the best-in-class products use.