iPhones have not been affected, yet. They are still going through that honeymoon period.
Honeymoon period? Since 2007?
You realize that the Mac was introduced in 1984 and Apple was profitable from the Mac's inception until the mid-90's, don't you? The IBM PC was profitable for a decade. Market share steadily fell. Then the bottom fell out of IBM's PC profits, and other divisions increasingly had to subsidize the Personal Systems division until it was sold to Lenovo.