This is not a new phenomenon.
According to a report issued Tuesday by Consumer Intelligence Research Partners, the retirement age of iPhones in the U.S. increased three months in the past three years.
This is represented in the chart above by the drift of the orange-bar/green-bar border up and to the left, toward longer upgrade cycles. Three years ago, almost two-thirds of iPhones in use were just 1-2 years old. Now nearly half are older.
What surprised me about the chart is when the orange/green border made its move.
According to CIRP, the lengthening iPhone upgrade cycle that looms so large in the Apple bear case is not a new phenomenon. Most of the damage was done in the U.S. by June 2014.
The effects of the iPhone Upgrade Program, introduced last year to resist the drift won’t be felt before September.