Reading a C++ book be like: "Hey remember those 5 special member functions we spent 300 pages teaching you to implement perfectly? Yeah, forget all that. Just use the Rule of Zero."
Nothing says modern C++ like spending weeks mastering destructors, copy constructors, and move semantics only to discover you should've avoided them entirely by using smart pointers and STL containers.
The emotional damage on page 320 is immeasurable. Thanks for the warning after I've already developed carpal tunnel implementing the Rule of Five manually.