Is node.js a must component to support zowe 2.x going forward.Does node.js requires a license to be used ?
Release : 4.0Component Brightside.
Node.js is required for zowe v2.x, see the requirement page for more details.
However, the node.js can be obtained for free, more details can be found in this article or this IBM blog.
Link to informations:System requirements for Zowe™ z/OS componentsHow to obtain IBM SDK for Node.js for Zowe™ z/OS componentsOptions on how to obtain IBM Open Enterprise SDK for Node.js