You can conjure up fictitious reasons, but the manufacturer never guaranteed the buyer that future hardware versions would use the same CPU.

Then there's your contrived reason to obtain source code - another bogus, non-sensical reason that'll never fly with devs.

You always have the choice of staying with an older model, or better, using Linux on your custom hardware. Don't push your socialism/communism on one of the most capitalistic companies on Earth (Apple)