OpenGL/Vulkan are not programmingd languages (though they can be accessed from C, C++, Rust etc.)
C is great but, in my opinion, is not productive enough.
Rust is strongly geared towards safety, which is great in general, but is surely not a 1st priority in gamedev (you often have a perfectly "safe", as in memory-safe and thread-safe code which fails to render 3d graphics correctly).
This leaves us with C++, which is indeed performant, arguably productive and has a benefit that there is a vast amount of libraries that are already written in it.
However, C++ is horribly complicated general-purpose language with quite a legacy bag.
What I'm saying is that one could imagine (and design) a language aimed at gamedev which will be simpler, nonetheless performant and have productivity features specific for gamedev/gfx.
