Aren't you as the person providing the application ultimately responsible for knowledge of what library calls work well and, thus, which you should use? I think

Aren't you as the person providing the application ultimately responsible for knowledge of what library calls work well and, thus, which you should use? I think Zed's cautionary statements are merely summarizing a bunch of his experiences, ultimately that this library call isn't worth using. Permutations of input is not "wrong", its a valid mechanism for exposing unexpected/undefined behavior. "Massively outweighed by the convenience" is subjective and, in many circumstances, very suspect.