> Depends on what you're trying to do. No it doesn't. people were effective with C++ before std::optional existed, before compiler assisted move semantics exi

> Depends on what you're trying to do. No it doesn't. people were effective with C++ before std::optional existed, before compiler assisted move semantics existed, and SFINAE is not something anyone has ever needed to understand in order to use something like the STL or any other template based library, such as Boost. You don't know what you're talking about, this isn't up for debate.