R didn't include OOP into its design, it was all grafted on later, are there are multiple systems. There's the S3 OOP system, the S4 OOP system, reference clas

R didn't include OOP into its design, it was all grafted on later, are there are multiple systems. There's the S3 OOP system, the S4 OOP system, reference classes and at least one add on package on CRAN which does something different. So which one are you complaining about? :)