The flip side of the coin was that even good programmers and language designers tended to do terrible extensions when they were in the heat of programming, because design is something that is best done slowly and carefully.
I fear - as far as I can tell - that most undergraduate degrees in computer science these days are basically Java vocational training. I've heard complaints from even mighty Stanford University with its illustrious faculty that basically the undergraduate computer science program is little more than Java certification.
The Internet was done so well that most people think of it as a natural resource like the Pacific Ocean, rather than something that was man-made. When was the last time a technology with a scale like that was so error-free? The Web, in comparison, is a joke. The Web was done by amateurs.
I think the trick with knowledge is to “acquire it, and forget all except the perfume” - because it is noisy and sometimes drowns out one's own “brain voices”. The perfume part is important because it will help find the knowledge again to help get to the destinations the inner urges pick.
If the pros at Sun had had a chance to fix Java, the world would be a much more pleasant place. This is not secret knowledge. It's just secret to this pop culture.
The idea that hardware on networks should just be caches for movable process descriptions and the processes themselves goes back quite a ways. There's a real sense in which MS and Apple never understood networking or operating systems (or what objects really are), and when they decided to beef up their OSs, they went to (different) very old bad mainframe models of OS design to try to adapt to personal computers.