Thought I would add some positive feedback. Obviously this is a broad topic and you have only skimmed the surface but I think it was a valuable addition to the discussion.
Ignore the bitter and petty haters leaving comments. When people don’t like your conclusions they love to insist it is crap because you don’t have 20 citations to white papers and 10 graphs showing various correlations.
Some people struggle with grasping the difference between an opinion piece and a scientific publication.
The way I see it, your story is a pretty accurate description of the trends among the more popular languages. There may be a decent amount of Scala jobs today but it is highly unlikely there will be in the future. Kotlin has a much more obvious appeal in this space. And there are so many other sensible options now Go, Clojure, Rust maybe even Swift.