[hackcrafter]

Really, the iPhone 7 was just the 6SS. The 'S' revision was spec and camera bumps, but no major case changes and the 7 made no case differences over the 6S.

But probably a 6SS or whatever wouldn't have sold as well, so they shipped a 7, and now the 8 actually does change the case significantly (glass back) and so thats not a 'S' revision.

No product cycle will play out perfectly in a versioning scheme, and your only surprised about the missing 'S' because they have had a naming scheme that has been surprisingly consistent for this long!

Next year will be the iPhone A...

[codesci]

The 7 dropped the headphone jack, changed from physical to "virtual" home button and added water resistance so there were more structural changes than just spec and camera bumps.

I'm more curious to why they skipped 9 (or maybe that is still coming...)

[valine]

They also redesigned the antenna lines to conform to the curves of the phone. The back of the 7 looks a lot nicer than the 6s in my opinion.