I disagree with this. By the ecosystem being huge do you mean the modules and different gems? That in itself is modularized for having the choice not to use them. The availability is what makes it powerful on top of the simplicity to get it all running.

Node is by far not simple for a new developer or new teams running node. Projects tend to drift toward unreadable due to poor design, just try following people's callbacks. I am not saying this is Node's fault but it being young results in developers' lack of experience.