It's not only about newbies in the end. When I started learning C++ back in ~2000 the semi-joke was that "C++ takes about 10 years to learn". The language is far bigger now, with more things you either need to know to cut out or somehow just not learn, but then you need to learn it if you end up working with code that uses it, etc.. This stuff, to use properly, usually comes with a list of "dos and don'ts" in C++ so it's not feasible to just on-demand learn the additions to the language and call it a day.