> Another language-changing paradigm added to C++ no, people were writing "concept-like" code since C++98 in a very bloated way with e.g. sfinae, this is just

> Another language-changing paradigm added to C++ no, people were writing "concept-like" code since C++98 in a very bloated way with e.g. sfinae, this is just standardizing existing practice (while improving it of course)