Most games aren't written in c/c++ today. Maybe most AAA games are. Most games are written in various engines that use other languages whether it's c# in unity or the language in game maker etc...
Yeah, not really, the engine aka Unity or Unreal is still written in C/C++. Also, any game that requires performance that doesn't use one of these pre-made engines such as Factorio or Prison Architect, still requires C/C++ at it's core, but can use Lua or something for gameplay.
No, because the bottleneck for most games is typically GPU performance, with a side of memory allocation. There is no magic dictating that every game needs deep instruction-level massaging, and many of the interesting bits that do need it can be turned into library code. The stack for a high performance game of 2068 might still be "low level" relative to other applications, but it has as much reason to shift towards a higher average level of abstraction as any other piece of software.
well that's 52 years from now, and for some perspective, FORTRAN was released 59 years ago. I don't think it's unreasonable to think that a paradigm shift will happen in half a century.
