Node.js is quickly becoming a popular development platform with adoption by plenty of big and small players. One of those is PayPal, who are replacing their incumbent Java-based system with one written in Node.js. For PayPal's blog post about this, visit https://www.paypal-engineering.com/2013/11/22/node-js-at-paypal/. Other large Node.js adopters include Walmart's online e-commerce platform, LinkedIn, and eBay.
According to NodeSource, Node.js usage is growing rapidly (visit https://nodesource.com/node-by-numbers). The measures include increasing bandwidth for downloading Node.js releases, increasing activity in Node.js-related GitHub projects, and more.
It's best to not just follow the crowd because the crowd claims their software ...