According to that (maybe selection-biased) source, it looks like the most popular iPhone is the one released the same year the first Pixel was released. We can't conclude anything about which is used longer, but Android app updates are required to target API level 30 I think for Android, which is no longer supported on the first Pixel, so there's probably a pressure that urges users off of that phone. I'd be surprised if percentage-wise, a larger share of Pixel users are on the original Pixel than iPhone users on iPhone 7.
Instead of making knee-jerk anti-Apple assumptions, you might try to check some facts.
edit: apparently the statistics I linked are behind a paywall, but the stats from the app I'm working on show me that approx 10% of users are on iPhones that are 7 years or older.
https://www.statista.com/statistics/626631/smartphone-market...
These days? I'm using a 2016 SE with iOS 15. Works great. I do not hate my phone. In fact, the small size, fingerprint sensor, and headphone jack make it a better buy than any modern smartphone. I can live without AI text recognition on my photos, which seems to be limited to newer phones. The app switcher, settings, browser, and everything else are still as snappy as the day I bought this thing. Only thing that doesn't run well? Spotify, which apparently doesn't bother to test their UI on small hardware (constantly clips links and text off the bottom of my screen), nor older CPUs (the app takes forever to start up, regularly freezes up when searching for songs, and can take anywhere from 1 second to 30 seconds to load even already downloaded albums).
So uh... good on Apple. Shame on Spotify.
My kid is still using an iPhone 6s and loves it. It works perfectly.
Most of the iPhone users I see are using a phone they purchased within the past three years. Does the average iPhone get used for longer than the average Pixel?