"Phipps said that creating subsets of the core classes in the Java platform was forbidden for a really good reason, .."

Which is? Now don't be shy, Phippsy, spill the beans. There are surely many who would just love to know a really good reason rather than think of any number of bad or false reasons.

That's the problem with these proprietary computer programming languages. The proprietor gets real pissy unless you do it his way.

I'd worry more about generating some income before I'd start whining about some silly little thing like this.