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What will happen to C/C++ in the next 20 years?

If the recent past is any guide:

  •     the C language will remain mostly stable and unchanged
  •     The C++ language will adopt many new things, in 20 years it will probably be from 2 to 10 times as complex as it is now

Some alternative programming languages will rise for the domain that is now dominated by C and C++, but they will not get much traction. The successful ideas from these languages will be incorporated in C++ (and a few unsuccesful ones too), but will be ignored by C.

C will remain dominant in Electrical Engineering curricula and careers (and in the Linux kernel). C++ will become dominant in low-level/high-performance/resource-constrained programming that is not intimately tied to electronics.

Hardware will continue to evolve, hence things that are now done in C and C++ will be done in other, more programmer-friendly but less performant (less CPU-friendly) languages. New application areas will arise that require performant languages to get the most out of the hardware, these things (gadgets? wearables? intelligent dust? who knows) will be programmed in C or C++.