That means squat. Lots of businesses use inappropriate technologies. Businesses are not infallible. I’ve lost track of the number of companies and clients I worked for that made poor business or technological decisions and had to call me in to fix their problems.
Node can be sufficiently fast under certain conditions, but it is not a generally scalable solution for concurrent systems. That has been proven time and time again. It’s a fact that if your Node application is computationally intensive, Node’s performance will choke.
Moreover, for truly high-concurrency, solutions like Go and Erlang can spin up hundreds of thousands of threads without breaking a sweat. Let’s see Node do that with its worker threads.