It's clear that:
- Apple use 4-year cycle when they do new groud-up uarch.
- One major uarch change after 2-years (A9 was massive IPC uplift)
- last step uarch is weak due to uarch IPC potential was depleted, big frequency jump as compensation
No, it is clear they used a 4 year cycle from A7 to A10. That doesn't imply that A11-A14 does the same. C'mon, does anyone really claim to extrapolate patterns based on a sample size of 1???
You could just as well have predicted A8 would be a 128 bit core, since they had gone from 32 to 64 bits after only one year of designing custom cores, so A8 would be 128 bit, A9 256 bit, and so forth