If you suddenly make string literals const char, tons of previously correct code will require diagnostics. Code which requires diagnostics is incorrect and has

If you suddenly make string literals const char, tons of previously correct code will require diagnostics. Code which requires diagnostics is incorrect and has undefined behavior if it is translated and executed anyway. C++ went through this over 20 years ago. I can't remember if it was already in c++03 or whether it was a post '03 draft feature.