According to Macrumors the new iPhone 14 (Pro and normal) will be more like an iPhone "13 S".
www.macrumors.com
Did Apple make changes in the upgrade schedule?
A new generation always had a new design.
After the X came the XS. - So far so normal.
Then came iPhone 11 and 12.
So 12 should be the "11 S", but the 11 kept the design of the X and XS and the iPhone 12 had a new design.
So technically the X / XS / 11 are from one generation.
And the 12 / 13 / 14 will be from one generation if the 14 will keep the same design.
So I guess one generation includes now 3 phones instead of 2.
Any opinions on that?
If you wonder why I think this is important:
Usually the "S" generations get longer support. I.e. the 6 vs the 6S. The 6S was released on year after the 6, so you would expect it to also get updates for one more year after the iPhone 6.
But while the iPhone 6 stopped getting updates after iOS 12, the iPhone 6S is running iOS 15 (and not just 13).

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Did Apple make changes in the upgrade schedule?
A new generation always had a new design.
After the X came the XS. - So far so normal.
Then came iPhone 11 and 12.
So 12 should be the "11 S", but the 11 kept the design of the X and XS and the iPhone 12 had a new design.
So technically the X / XS / 11 are from one generation.
And the 12 / 13 / 14 will be from one generation if the 14 will keep the same design.
So I guess one generation includes now 3 phones instead of 2.
Any opinions on that?
If you wonder why I think this is important:
Usually the "S" generations get longer support. I.e. the 6 vs the 6S. The 6S was released on year after the 6, so you would expect it to also get updates for one more year after the iPhone 6.
But while the iPhone 6 stopped getting updates after iOS 12, the iPhone 6S is running iOS 15 (and not just 13).