This mischaracterization of the discussion is curious, but it is certain that no two companies have the same problems in need of solving. Of course certain tech

This mischaracterization of the discussion is curious, but it is certain that no two companies have the same problems in need of solving. Of course certain technologies could only emerge out of a place like Facebook. Only a place like Facebook would have a need, particularly with respect to resources, to pour R&D into these technologies to solve their particular problems. But that's not what we're talking about. The question posed was if Facebook's good developers are better than good developers at run-of-the-mill companies. That is not clear. People at Facebook, with an average tenure of only 2.3 years, have almost certainly also worked at run-of-the-mill companies so that already suggests that you can find good developers all over the place. That developers at Facebook solved problems Facebook had doesn't prove no other developer could also solve Facebook's problems if they also worked at Facebook. Solving problems is literally the job of a developer, so it seems highly unlikely that all other developers outside of Facebook cannot also solve problems. Of course developers are only going to solve the problems in front of them.