[justlurking]

That’s assuming that companies themselves want to stay at the top of the technological heap. Motorola for instance, was still using C long after it was irrelevant.

C isn't irrelevant. The Linux kernel is in C, along with a large part of the supporting tool chain.

[AppyPappy]

I’m still maintaining C batch programs. They were written when COBOL was “too slow and heavy”. Now, of course, it doesn’t matter.
The problem is that things change too fast. We are developing in Groovy/Grails to get ready for our Enterprise system conversion and they may drop Grails.
Note: I started on a Burroughs 6800 if that tells you anything.
The other day, a young coder told me he can’t mimic the existing code in Javascript to which I replied “You realize that the existing system is written in Javascript, right?”. Nope, still can’t do it.