I think what's hard for people to realize is, people who like rust usually aren't saying "is rust going to replace it"? Like cheesey blogs by hype artists say crap like that, but really having both is obviously beneficial to the programming community.
All Adobe products heavily use C++, Most Digital Audio Workstations heavily use C++, All 3D authoring software heavily use C++, Most new core Blender code is now C++ instead of C. Of Course, most game engines are C++ based as well. So this is just the consumer space.
There are domains where there is simply no alternative to C++ in terms of features and speed. Rust maybe, but I don't know enough about Rust to formulate an opinion. No need to say that C++ is absolutely here to stay.