The State of the Octoverse
octoverse.github.comThis is a good report. Looks like Dart is finally climbing on the back of flutter and nice to see Rust growing as well.
Java with all the controversies around licensing/build/release and C# with more open .Net Core will probably come closer in terms of adaption. Personally what I see is traditional Java shops are either sticking to Java or exploring something like golang but rarely move to C#. Same is happening for .NET.