Here's what I know:
* AI / ML can be done in many languages, but no one's seriously considering C, despite the performance requirements. C++ is sometimes used.
* self-driving companies are hiring for C++.
* Mobile is Swift / Kotlin with C++ for performance-intensive code where appropriate.
* Web is anything except C and C++ (thankfully)
* Game development is C++
* The enterprise has switched to web technologies or is still using Java/.net.
* The desktop varies, but it's mostly .net / Swift + Obj-C / C++, with the exception of gnome perhaps, which I'd argue is an anomaly.
C is still holding on in kernels and low level embedded, where it's expected that C++ and maybe Rust will continue to squeeze it.
Personally I don't care that much about the above two. Banging the same bits for decades gets tiresome.