There's an unimaginable amount of business critical code written in Java already. Java is seen by businesses as good enough, so, barring some breakthroughs in C

There's an unimaginable amount of business critical code written in Java already. Java is seen by businesses as good enough, so, barring some breakthroughs in CS, there will not be much pressure to migrate off it. And even if there were (let's say Oracle starts charging unreasonably much for Java, the way IBM does for mainframes), we can still see plenty of COBOL/MF architectures in the wild today.