C++, I am a library developer with some embedded experience. I can easily interface with c libs and expose my lib with a c interface. With clang, static analysis catches most bugs before runtime. Everything I write can be compiled nearly anywhere with very little dependencies required. Excellent IDE and LSP support with a ton of documentation on the language features available (admittedly, there are a lot). The standard library is gigantic, useful, and well documented. It is used everywhere, so resources and example source code in C++ are very easy to come by. Project configuration (via CMake) is extremely powerful and expressive (though not technically C++).
Some languages have some of the elements I listed, but no other language has them all.
I would also mention support for third-party compiler cache systems. Install something like ccache, set a couple of flags in the CMake project, and your whole project can now reuse build artifacts with barely no CPU load.
If you don’t mind throwing your two cents my way, what’s a good intro to C±± book for those who already have a basic understanding of C?
A tour of C++ by Stroustrup, the latest edition. It’s short but good.
