The historical notion of POD is that it's a class type that has no C++ shenanigans going on, and thus works like it does in C. As a result, while there are a fe

The historical notion of POD is that it's a class type that has no C++ shenanigans going on, and thus works like it does in C. As a result, while there are a few slightly different definitions of POD, all of them share the commonality that having a non-POD member makes the class non-POD; in other words, POD-ness has a recursive quality. It doesn't make a lot of sense to not have this recursive quality to POD-ness, because the fact that C++ shenanigans are involved doesn't go away just because it's implicitly handled for you by the compiler.