I'm not so sure about that anymore.
iOS 12 came out in Sept. 2018 and Apple has provided updates/bug fixes for it as recently as
Sept. 2021, so for 3 years.
But starting with iOS 14, Apple says they will no longer provide updates/bug fixes for it. So they're abandoning it after 1 year.
Last week, MacRumors shared news that Apple had stopped releasing iOS 14 security updates and was pushing those still on iOS 14 to upgrade to iOS 15, an apparent reversal of a promise to allow users to stay on the iOS 14 operating system. Apple today told Ars Technica that the option to stay...
forums.macrumors.com
Sure, some will say just update to iOS 15 or whatever version of iOS is receiving support at the time. But what if the user doesn't want Apple's CSAM B.S. or whatever other future garbage they come up with that's included with the iOS update?