My comment was meant to point out a simple fact: folks who bet their careers on Java staying popular will lose.
HaHaHa... Very true. I think most of us who have spent few years in the industry know this already and probably worked with few other languages and technologies. My concern is anyone working hard to master java might be disheartened with such comments, which are based on speculations at this stage.
For our young friends, keep up the hard work and master at least any one language. Carry on java route if you have committed.
About the locomotive example, bright people who mastered steam engines went on to design internal combustion engines. Something we still use on roads and tracks! Some master one thing others jiggle many things. Winning and loosing is individual’s perspective of how they see things.