I've mostly done Java in my career and I tend to stick to it (or Kotlin now). I've always said the power of java isn't in solving programming problems, it's in solving organizational problems. The killer feature that vaulted it to the top and still hasn't been beat is javadoc.
Not javadoc the standard, but javadocs for the standard library. It explains behavior in much more detail than other languages' docs, so I'm rarely surprised.
Why do you think javadoc is better than docstrings? There are docstring-based languages that encourage good practice and can produce what I regard as excellent integrated docs. E.g., Julia's Documenter:
