It has in a bunch of places. C# is widely used in video games, and Java is widely used in financial trading including HFT scenarios where every millisecond matt

It has in a bunch of places. C# is widely used in video games, and Java is widely used in financial trading including HFT scenarios where every millisecond matters. And obviously in Android it's used to write large parts of the OS. There are places where it hasn't, but that's more due to missing features than JIT vs AOT. Java only got SIMD support recently and it's still in a preview mode, partly because it's all blocking on Valhalla value types. PGO can make a big difference to C++ codebases, and as JIT is basically PGO with better deployment/developer ergonomics it could probably also work in C++ too. It's just that the most performance sensitive C++ codebases like Chrome prefer to take the build system complexity hit and get the benefits of PGO without the costs, and most C++ codebases just go without.