I can see the Python etc being languages that are picked up as "do it yourself" learning projects. The C variations might presumably be something learned as part of computer science degrees. Not as likely to be self taught so tutorials wouldn't be the type of search those developers would do.

The question for a young person deciding on a career path is who earns the money? I'd bet C(...) programmers still earn a much higher share of programming dollars, especially on a per person basis.

The surprise to me on this list was VBA placed at all. And to see the word Delphi blew me away! That said, I don't recognize a third of the languages on the list.

At this stage in my career, I may have one more big learning project in front of me. Part of my role involves getting data from multiple sources, packaging it and getting it in front of fellow employees. Seeing the writing on the wall with what Microsoft is doing in Excel VBA, I may be looking at some basic Python skills as a companion to that.