JavaScript is a messy language, but ignoring that, the module ecosystem is a mess. There are many duplicated modules, many of them done in a half-assed manner by inexperienced developers and rarely updated.

For example, the Node community absolutely loves MongoDB for inexplicable reasons, and support for other datastores is terrible. Despite Postgres supporting hstore for years and Node being popular for years, the two hstore modules are "node-postgres-hstore" (7 stars on github) which hasn't been updated in 1 year and "node-hstore" (17 stars on github) that hasn't been updated in 2 years. Everything I've seen indicates that this is typical for modules in Node.

Meanwhile, Ruby and Rails support Postgres extremely well at this point.

Similarly, node has several migration libraries, all of which are pretty limited. One of the popular ones, "node-migrate" by one of the most prolific node module developers, still has an open issue from 2 years ago about using timestamped migrations, with the developer commenting as if the concept is news to him (https://github.com/visionmedia/node-migrate/issues/2)