One of the big reasons to use Node.js for ETL (Extract, Transform, Load) is because of its asynchronous nature. If you have hundreds of rows of data that need to be transformed and transmitted, Node.js can quickly process each one with non-blocking calls. This way your scripts are doing more processing and less waiting around.
Npm is free, publicly available, and easy to use! It contains over 465,000 modules used by more than 7 million developers, with downloads reaching several billion every month. Public packages are open source, but there are also Enterprise options with different hosting options for private packages. This is useful for corporations who want to use npm as a library repository. The point is that if you’re trying to get something done, someone else has probably made it most of the way there. Once you determine the pieces you’ll be working with, you can search for related packages on the npm site. You don’t need to reinvent the wheel when it comes to Node.js, since there are a number of packages for connecting to various APIs, doing data validation, converting file formats, and much, much more.