I did a lot of C++ 20 years ago, and so figured I "knew" it. I recently tried writing some C++ again, and couldn't recognize the language at all... the symbols,

I did a lot of C++ 20 years ago, and so figured I "knew" it. I recently tried writing some C++ again, and couldn't recognize the language at all... the symbols, functions, libraries, etc. were so radically different that it more than exceeded what I would consider to be the threshold for an entirely new programming language.