Maybe they care more about breaking library code than user code? Not saying I agree but maybe that explains some of their decisions. I don't know if changing t

Maybe they care more about breaking library code than user code? Not saying I agree but maybe that explains some of their decisions. I don't know if changing the realloc() NULL behavior to undefined necessarily breaks code. It definitely leaves the door open to the possibility of breaking code on standard library users but it's still up to the implementation to change the behavior for the code to break.