Have you tried writing a patch for one of the large C compilers? and getting it into mainline? not trivial either. For the JVM there are choices. IBM, Azul, Or

Have you tried writing a patch for one of the large C compilers? and getting it into mainline? not trivial either. For the JVM there are choices. IBM, Azul, Oracle, OpenJDK and many other more academic ones. With different tradeoffs and costs. I have switched massive code bases from one to the other with minimal effort. Switching C compiler is more invasive than switching JVM providers. And many other languages only have a single sanctioned runtime. Sure the JVM eco system is far from perfect. But it is dependable!