You know, Porsche does modernize its 911, while keeping the shape cues almost everyone recognizes and loves.
If you look at the last 4 major versions - the 993, 996, 996 and 991, it's obvious that design changes. This is not so obvious at all between the iPhone 6 to the 8, they basically look alike. Even minor Porsche revisions like 991.1 vs 991.2 have more changes (particularly inside the car) than say, the iPhone 6S vs the 7.
Apple has been running too long with this design and the problem with the iPhone 8 is that is looks really dated. It's back to bezel-land one more time. The design wasn't that nice to begin with, and now it's just cringe-inducing at that price.
But you get cookie points (Tim Cook doesn't award brownie points) for comparing a Chinese-made, run-of-the-mill consumer item with an iconic luxury sports car that only very few people can afford.