I agree 100%.

Each language shines for specific applications and the provided public data adds little value without clusterization per each application type.

Plus, GitHub is not representative of the real world. As an example, how much Cobol is versioned there compared to the number of LOC in production today?

Also, less new questions on SO may just be a symptom of a mature language instead of a decline.

This is an interesting topic that rarely gets addressed objectively.