This chart shows each technology’s satisfaction ratio over its total usage.
Additionally, technologies that have an interest ratio (percentage of non-users interested in learning it) over 50% are displayed as “on fire”.
One interesting entrant in the space is Next.js, which has been generating a lot of interest lately. Although it's not quite comparable to a full-featured Node back-end, its single-minded focus on solving the server-side-rendering problem for React apps has made it a very useful tool.
It's also interesting to see what role serverless technologies like AWS Lambda will play over the next couple of years. Who knows, the back-end category as we know it might soon be a thing of the past!