That's not really the problem here--CHAR_BIT is already 8 everywhere in practice, and all real existing code[1] handles CHAR_BIT being 8.
The question is "does any code need to care about CHAR_BIT > 8 platforms" and the answer of course is no, its just should we perform the occult standards ceremony to acknowledge this, or continue to ritually pretend to standards compliant 16 bit DSPs are a thing.
[1] I'm sure artifacts of 7, 9, 16, 32, etc[2] bit code & platforms exist, but they aren't targeting or implementing anything resembling modern ISO C++ and can continue to exist without anyone's permission.
[2] if we're going for unconventional bitness my money's on 53, which at least has practical uses in 2024
The question is "does any code need to care about CHAR_BIT > 8 platforms" and the answer of course is no, its just should we perform the occult standards ceremony to acknowledge this, or continue to ritually pretend to standards compliant 16 bit DSPs are a thing.
[1] I'm sure artifacts of 7, 9, 16, 32, etc[2] bit code & platforms exist, but they aren't targeting or implementing anything resembling modern ISO C++ and can continue to exist without anyone's permission.
[2] if we're going for unconventional bitness my money's on 53, which at least has practical uses in 2024