If you want the full-blown thing, there's a whole book called "Inside Apple" which details the whole long-term extremely secretive nature of their business (this was back from the Steve Jobs era).
Apple is similar to Disney in their core business model being anti-golden-rule. Not "treat others as you would like to be treated" but "treat others as you want to treat them, and insist they treat you as you want". Don't care about respecting others' trademarks or ideas, take creative bits from everyone, be super vigilant and protective (even antagonistic) about anyone else who uses any of your ideas.
The claim should be completely indisputable. It's well known that teams within Apple are not privy to the roadmaps of other teams, even teams working on a different aspect of the same project.
Lot of secret projects and buildings in SJC that belong to apple. No Apple logos, sign an NDA in the lobby, meet in conference room outside the working area. It is indisputable.
Which is completely different from Amazon, I’m not even considered an SDE - I am a consultant at AWS - I can get read only access to source code of services if I request it.
The downvotes must be coming from asking about the latter point since it's clearly institutionalized. The former is interesting to ask about though, how is keeping product roadmaps a competitive advantage in Apple's case? Which teams is this especially so, and on which products is it in their interest for the roadmap to be out in the open?
Apple is similar to Disney in their core business model being anti-golden-rule. Not "treat others as you would like to be treated" but "treat others as you want to treat them, and insist they treat you as you want". Don't care about respecting others' trademarks or ideas, take creative bits from everyone, be super vigilant and protective (even antagonistic) about anyone else who uses any of your ideas.