I'd argue that UB is an evil enough concept in C that still exists and is expanded on in C++ that should be known by every programmer. Sure, paradigm difference

I'd argue that UB is an evil enough concept in C that still exists and is expanded on in C++ that should be known by every programmer. Sure, paradigm differences mean that idiomatic C code is not idiomatic C++ code, but knowing the pitfalls of the language should be mandatory, imho.