Scott Meyers was the go-to reference for "expert" C++ knowledge for over twenty years, he retired after his C++14 books came out and a mere two years later he couldn't even keep up with the language to make technical corrections.

C++ is a large, intricate language with features that interact in complex and subtle ways, and I no longer trust myself to keep all the relevant facts in mind. As a result, all I can do is thank you for your bug report, because I no longer plan to update my books to incorporate technical corrections. Lacking the ability to fairly evaluate whether a bug report is valid, I think this is the only responsible course of action.

https://scottmeyers.blogspot.com/2018/09/the-errata-evaluati...