truthadjustr,
Perhaps, the killer-app for C++ is still coming ?
What?!
You mean none of the thousands of games out today are "killer apps" for C++?
Microsoft Word, Excel and perhaps most of their products are not killer apps for C++?
The Chrome browser, and hence the V8 Javascript engine and hence node.js and Electron and MS Visual Studio Code are not killer apps for C++?
What about the Mars rover software? Joint Strike Fighter software?
So much that we use everyday is written in C++.
I think one of the biggest killer apps for C++ is LLVM. That is not only the bases for the Clang C++ compiler but serves as the basis for many other language compilers: Including: ActionScript, Ada, C#, Common Lisp, Crystal, CUDA, D, Delphi, Fortran, Graphical G Programming Language, Halide, Haskell, Java bytecode, Julia, Kotlin, Lua, Objective-C, OpenGL Shading Language, Pony, Python, R, Ruby, Rust, Scala, Swift, and Xojo.
Imagine that, whatever your favorite language it might be built with LLVM, hence dependent on C++!
For me the killer app for Go is CockroachDB, a distributed, scalable, fault tolerant, ACID compliant SQL data base. Wonderful.
https://www.cockroachlabs.com
Memory in C++ is a leaky abstraction .