A big benefit of Node is that it's sexy and everybody has their eye on it. Since Node applications are extendable thanks to a huge eco-system of packages, it's the backbone for some of the biggest frameworks such as React and Express. As mentioned before, productivity is high (especially for beginners) due to the vast amount of new tutorials and extensions.
While older corporations and/or large-scale applications might require the use of more established technologies (PHP, SQL etc.) for reliability, startups and new developers really love Node.