People need to understand that decisions should be made based on the team's current skill set. If your team is comprised of Java developers, time shouldn't be wasted on researching node.js; rather they should focus on how to leverage their Java knowledge with Scala. It frustrates me to hear people falling for the hype machine and falling hard when they could have easily avoided by asking themselves two questions: what's the path of least resistance to shipping our product out the door, and what's the opportunity costs relative to alternative paths?