Overloading methods in R

On Thu, 21 Apr 2005, Ali - wrote:

However, in S3 you can create a "generic" generic function by not
specifying
arguments but only '...' - this way any methods can take any arguments 

(and

you don't force your argument names onto other developer's).

So why did they go a step backward in S4 and remov this feature?

I might be misunderstanding what you're getting at here, but if indeed I
do understand this correctly then not only is it still possible in S4 but
I was tought that it was generally considered Good Behavior.

setGeneric("testFun", function(...)