[pjmlp]

There are JVM implementations, like Azul, that use LLVM for their AOT/JIT compilers, so the last point isn't really a plus for C++.

Java like C and C++, enjoys multiple implementations.

Regarding monomorphization, it is still open how much Valhala will go into that front.

Even if Java will never be as good as C++ in generics, there are several other issues that usually tend to have Java chosen for instead of C++, even if C++ wins in the microbenchmark games.

Likewise most options for running Java on the GPU aren't as feature rich as C++, and that is certainly an area where C++ will be dominating in decades to come.