From the iPhone X onward, Apple started giving at least 5 years of iOS software updates, but even if you don’t get the latest and greatest features, your phone would still work. When it gets about two or three years removed from its last iOS version update, just like the iPhone 8 and iPhone X are now, you may start losing access to apps that are no longer coded with older mobile OS versions in mind.
Given that the iPhone X is nearly eight years old, some app incompatibility can now be expected, and the fact that the Netflix app will cease to support it in one of its future versions is only a harbinger of things to come.
Call it planned obsolescence, or unplanned obsolescence, an iPhone that is in its seventh or eighth year is already getting long in the tooth as far as specs and features are concerned, even if it is on its second or third battery and still works.
Still, those who like to use their iPhones until every last bit of spec is squeezed out of them, will be able to use their current Netflix app version without getting any new features, or simply stream movies and TV shows via the Safari browser.