.@PatrickMcGee_ on the hidden achievement he says defines Apple's real moat over the last 25 years: "Apple doesn't just have some tier-one suppliers that anybody else can access. They go down two, three, four tiers in the supply chain, sometimes down to the raw minerals, making sure that things are up to their quality levels." "The stranglehold they have, not just on how a product is made, but on how the sub-suppliers, sub-vendors, sub-sub-vendors, make the threading that goes into something…