There isn't even one "agile" to be the "best": if you're following one exactly because of that then you are Doing It Wrong. Compare code: there's no "only best

There isn't even one "agile" to be the "best": if you're following one exactly because of that then you are Doing It Wrong. Compare code: there's no "only best" way to structure your code, but most everybody would agree that a 3000-line long "main" function with one-letter-named global variables is probably Doing It Wrong.