Pretty close to none of the things added to C++ over the years are specific to certain kinds of problems. It's not like you can't write a game/hft/physics/svg rendering perfectly well in C.
All of the work on compile time programming in the last few versions is definitely for performance-oriented domains (certainly others may choose to take advantage of it as well). If you don’t need that kind of performance or don’t need to have complicated logic run at compile time to save on those runtime costs, those features may not be so necessary for you.
And there are definitely things that these features provide that are impossible in C.
And there are definitely things that these features provide that are impossible in C.