I am pretty aware that C and C++ are going to outlive me, but that doesn't mean they will be the systems programming languages of choice until the Sun ceases to exist.

Being someone that enjoys C++, doesn't mean I have to agree with all design decisions.

Neither will I reject to use C, if that is what the customer pays me for, even if I dislike it. Professionalism comes before personal opinions.

Not necessarily. Even the C++ committee now accepts that most of the C++ code that will ever be written has already been written.

I have no idea where you get the claim from. I know many members of the C++ committee, and they expect new C++ to continue to be written, else why would they bother with C++11/14/17?

But do they expect more new billions of lines of C++ to be written than have ever been written before?

Could you please clarify? Do you mean that more than 50% of the eventual total lines of C++ have already been written as of today (Peak C++, anyone)?

Or do you mean that a very large percentage of eventual lines of C++ to be written in the future are expected to be endless variations and downright repetitions of the total C++ lines been written as of today?