It's also six years old and where it's pokey tends to be apps, not the OS. The browser, mostly. Turns out we all like to write a lot of JavaScript, I guess?

Even if that weren't the case, a six-year-old iPhone 8 has out-survived the useful, secure life of, what, every Android device not made directly by Google? Hell, a 3.5-year-old iPhone 11 has out-survived the useful, secure life of the overwhelming majority of Android devices, too. And, further, given that A11->A13 was the most significant period of perf improvement and energy reductions (the A14/A15 are moderately faster but the tail certainly appears to be here), that bodes well for its continuing usefulness.