I think this chart would be more useful if the full name of the project were used instead of the file name (i.e. "nlohmann/json" instead of "json.hpp"), and als

I think this chart would be more useful if the full name of the project were used instead of the file name (i.e. "nlohmann/json" instead of "json.hpp"), and also including the number of repo stars as a column. Just looking through the list of single file JSON libraries, "nlohmann/json" is buried in the middle (most popular C++ json library) and surrounded by small projects.