It is well suited to running concurrently as in, many cores, and in a distributed fashion, across many computers. It was built to run telephone switches and similar highly available, high performance gear in a way that is resilient to failures.

Node is mostly single-threaded still, right? The Erlang VM, Beam, runs truly concurrently. Also, a few large pieces of CPU work cannot block the scheduler indefinitely. I'm not aware of a runtime that works quite like it. Suits me well. I use it throigh Elixir.

It is not the fastest in any given metric from what I know but I think it delivers enormously well in real life scenarios.