java is the only language that has room to grow

e.g. while C is not popular, this is not because it is a bad language, it is because the design of other languages better suits more applications than the kinds that C is suitable for

in other words, C has the greatest coverage in its market, perhaps 99% of market share. there are a number of places where truly ancient code has not been updated to C yet, and there are a number of places where libc has not been fully implemented yet. platform support is either lacking, or provides its own incompatible runtime, built in the assembly language for the host architecture

but in markets where java could have been used, java is not an undisputed king, because programmers are free to "play favorites" and do things with, in order of popularity, another language: PHP, python, C#, C

even so, overall, java is twice as popular as PHP, PHP is twice as popular as python, python is twice as popular as C#