I'm really pretty anti-node, but this article isn't very good. The concerns here are mixed up and not very thorough. All these points need graphs, charts, something solid to anchor them to. This is the sort of article that polarizes, but doesn't add to the discussion.

It starts off strong talking about a high bug count, but never gets into specifics there.

As far as scaling across cores goes, it's disingenuous to suggest that node can't do this, there are a number of options here. Message passing, for instance, does indeed work.

As far as nested callbacks sucking, I totally agree. But a walk through why would add a lot more substance here as well.