For me the biggest issue is motivation, rather than old and boring vs. new and shiny. More than what I know, it's about what makes me happy. I'm sure people build awesome things in one Javascript du jour framework or another every day, but I'm just not one of them. I know Javascript and Node.js fairly well, but I don't find any joy in programming in them. Whenever I make the effort, my motivation always dies off and I either abandon the project, or rewrite it in something else. Anything else.

On the other hand, technologies like Elixir, Erlang, Elm, and Riak, for instance, are immensely enjoyable to me, so they keep my motivation alive. In my opinion, whatever makes you happy and motivated is the best.