What is Trending
Checkout what is trending, do not learn something doomed to be deprecated.
The latest is https://2021.stateofjs.com/en-US/
Annual developer survey. And compare the popularity on the trends page.
Updated every October (before the Nov/Dec holiday season) summarizing the trends this year.
Besides the annual summary, check https://github.com/trending for current tranding GitHub repos.
Updated every month, ranking 300+ databases.
Updated every month, ranking the programming languages.
Similar to TIOBE ranking but by analyzing how often language tutorials are searched on Google.
Compare the open source projects.
Check technology adoption: https://discovery.hgdata.com
E.g. Google BigQuery: https://discovery.hgdata.com/product/google-bigquery