hmm not quite my friends. C is still a major language, and the difference is that is a low level programming language. It works pretty much as assembly, directly with the processor.
Why do you think Operating Systems are written using C and not other language. Using C you get to control more the memory management of your operating systems as well as more directly the flow of your application. There are many things why you should learn C is that what you really are aiming for.
So it depends on what your goal is and where you're heading at in your professional life.
Hope that helps,
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