You can totally run a cluster of Node instances. But each instance can only do one thing at a time. No multiprocessing, you have to spin up a new VM for each thing you want to do.<p>You also don&#x27;t get shared memory concurrency when it&#x27;s beneficial, and you have to speak in callbacks.<p>There are better langs out there for concurrent web. Erlang and Haskell+Warp are fantastic, for instance.