If you noticed, the article did not actually tell you what happens when destructor throws. It was only about double-exception case and throwing in nothrow() function (both perfectly valid things to know when jobbing).

What state are members left in when destructor throws? If exception happens in virtual base? If member destructor throws, what other class members have they destructor executed? will delete[] be called?

The author possibly does not care to know themselves! As you say, totally irrelevant to any normal programming. Unless you are writing clang or gdb