NVidia GPUs are now designed explicitly for running C++ code efficiently.
CppCon 2017: Olivier Giroux "Designing (New) C++ Hardware”
https://www.youtube.com/watch?v=86seb-iZCnI
Assuming another systems language, e.g. Rust, does indeed replace C++'s use cases, it is still a very long path until it gets this adoption level from hardware vendors.
I develop some HPC code, and most of them is infeasible without C++.
Other languages' high performance libraries PIL and numPy is written with C & C++.