One stockholder speaks
Apple is hesitant to reveal succession because they know no one will ever be able to fill the shoes of His Holiness the Jobs.
When you refer to someone as 'Messianic' you know the marketing department has gone too damn far.
Apple investors (and yes I am one and have been for many years) want a solid business approach founded in practical principles and practises; not a strategy based on a cult of personality. No business should depend on just one person.