Most sites say \"callee\" as a property of Function.arguments is deprecated. But some sites go further and say the whole of Functions.argument is deprecated E.g. http://apta
Function.arguments is deprecated, but it's only deprecated in favor of the vanilla arguments object that's available within a function. (e.g. using x = arguments[i]; instead of x = theFunc.arguments[i];)
That's now the preferred (and as you say, extremely useful) method for accessing the ordinal arguments received.