The advice is practical: if your goal is to be a good programmer and therefore attractive to companies, you should use Node JS.
Node.js is the multiplatform environment that dominates the development of complex applications and companies are looking for programmers to handle it because it facilitates their online operations. The characteristics of Node.js make it an indispensable tool particularly for companies that base their services on computing.
Now the answer to this question: Why is it important to have the Node JS?
In addition to reducing work times, the environment runs on multiple servers including Windows, Mac OS X, and Linux. It supports the exchange of simultaneous data without losing the quality of the product in the process, which implies the use of the same language for clients and servers by the programmer.
Returning to its speed feature, it is possible thanks to its asynchronous design that allows simultaneous operations to be executed avoiding waiting when the database is processing. This feature means that it is three times faster than Python 3 and up to ten times faster than PHP.
Another reason why a programmer with knowledge of Node.js is sought in companies is that the multiplatform environment manages high-traffic web applications. Most of the existing servers support up to 4,000 simultaneous users, but Node.js manages to increase the number by eliminating the problem of slowdowns and crashes that occur when the number of people connected exceeds the expected limit.