As of my last knowledge update in September 2021, Node.js was indeed in high demand within the tech industry. Node.js is a popular runtime environment that allows developers to build scalable and efficient server-side applications using JavaScript. Its non-blocking, event-driven architecture makes it particularly well-suited for building real-time applications, APIs, and microservices.

The demand for Node.js was driven by several factors:

1. JavaScript Proficiency: Many developers are already familiar with JavaScript due to its use in web development. This familiarity made it easier for them to transition to using JavaScript on the server-side with Node.js.
2. Efficiency and Scalability: Node.js is known for its ability to handle a large number of concurrent connections without consuming excessive system resources. This made it a suitable choice for applications that require real-time interactions or high levels of scalability.
3. Developer Productivity: The ability to use the same programming language (JavaScript) for both frontend and backend development streamlined the development process and improved developer productivity.
4. Vibrant Community: Node.js has a strong and active open-source community, which results in continuous improvements, updates, and a wealth of libraries and modules available for various use cases.
5. Microservices Architecture: As microservices architecture gained popularity, Node.js was often chosen for building lightweight and efficient microservices due to its small footprint and performance characteristics.
6. IoT and Real-time Applications: Node.js was commonly used for developing Internet of Things (IoT) applications and real-time applications like chat applications, online gaming platforms, and collaborative tools.
7. Serverless Computing: With the rise of serverless computing, Node.js became a popular choice for building serverless functions due to its lightweight nature and fast startup times.
8. Job Market: Job postings for Node.js developers were prevalent, indicating a high demand for professionals with Node.js expertise.

However, please note that the technology landscape can change rapidly. I recommend checking the most recent job boards, tech news, and industry reports to get an up-to-date understanding of Node.js demand in the current year, 2023. While I can provide general trends, the current situation might have evolved since my last update.