I just don't feel this "need" to sit down and relearn anything. I become aware of new stuff through posts like this and view it as a new tool that I could but don't have to use. And if I encounter it in some code base then it's simple enough that a quick one minute look at cppreference clears any confusion.

I follow you, unfortunately given that most Java and .NET implementations aren't bootstraped, there is Node.js, most modern runtimes build on top of LLVM and GCC as their backends, I still have to keep my C++ knowledge relatively of up to date.