In response to question 1: yes, it often very much is, as the examples that I raise in the article show. It could well be the case that there are better technologies for this kind of thing according to certain metrics, but those technologies don't have anything even remotely approaching the Node community driving them. In open source anything, that is decisive. Erlang is more mature, yes, but the community is small and highly insular. Tornado, Netty, etc. also do non-blocking I/O and the like, but they simply don't have the same inertia behind them. That inertia could be precisely what makes Node stable and acceptable for ever-broader enterprise usage. But overall, my claim is more sociological than technological.
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