I’ve bought every generation of iPhone. Here's what I've learned.

[iMore.com]

There have been 14 generations of iPhone so far, and I've owned at least one from each. Here's what I've learned along the way. Full story from the iMore Blog...

 

[scruffypig]

There have been 38 different models of iPhone.

 

[Up_And_Away]

Good article and some interesting opinions by the author:
-IPhone trade in program is ideal for those who want the newest every year.
-Features for each release are usually incremental (imho, buzz and profit often hinge on one single “big” change. 120 hz, no notch etc. how big it tangibly is to the device is iffy)
-The ease of the ecosystem makes leaving unlikely to be worth it. Imho: On this one, a few mostly non Apple users tend to be vocally angry by it, saying Apple is purposefully making it difficult to leave the ecosystem. My response? Correct, Apple is purposefully making it hard to leave the ecosystem. Rule #1 to make it difficult to leave the ecosystem, make the ecosystem peerless, make it the best there is. Dastardly Apple has done just that. It’s the best, period. Rule #2, if the ecosystem works with everything and you can slide in and out of it, this is not an ecosystem (and also makes it unlikely to have features that ‘just work’.). Rule 3, see rule 1 and 2 on how to create the most successful personal electronics company of all time.