I don't understand why people point to Webkit as a big Apple contribution. Basically Apple took KHTML, which is under the GPL and built Webkit out of it. It is

I don't understand why people point to Webkit as a big Apple contribution. Basically Apple took KHTML, which is under the GPL and built Webkit out of it. It is basically forced by the license to release the source. Your point would have more validity if KHTML was BSD licensed and Apple released the source out of the good of their heart or if they built Webkit from scratch and then open sourced it. Apple basically saved a lot of effort by using KHTML and would have been sued if they didn't release the source.