Node.js is not for me (and why)
(These days there is also io.js, which is a compatible fork split off from node.js for reasons both technical and political.)
(I also think that a model with explicit concurrency is going to scale to a multi-core environment much better. If you promise 'this is pure async, two things never happen at once' you're now committed to a single thread of control model, and that means only using a single core unless your language environment can determine that two chunks of code don't interact with each other and so can't tell if they're running at the same time.)
As for the package availability, well, it's basically irrelevant given the lack of the appeal of the core. You'd need a really amazingly compelling package to get me to use a programming environment that doesn't appeal to me.
Now that I've realized all of this I'm going to do my best to let go of any lingering semi-guilty feelings that I should pay attention to node and maybe play around with it and so on, just because it's such a big presence in the language ecosystem at the moment (and because people whose opinions I respect love it). The world is a big place and we don't have to all agree with each other, even about programming things.