Unlike with previous iOS releases, Apple will let users choose to stay on iOS 14 and still receive security updates, even after iOS 15 is released
Benjamin Mayo / 9to5Mac : Tweets: @lukemiani and @snazzyq Tweets: Luke Miani / @lukemiani : iOS 15 *STILL* supports iPhone 6S 🤯 Super impressive Quinn Nelson / @snazzyq : Fun fact: iOS 15 will run on every device that runs iOS 14. Yes, your 6-year-old iPhone 6S will be getting the latest version of iOS. Extraordinarily cool and yet another reason buying an iPhone is actually a great value.
Context & Ripple Effects
At WWDC-time 2021 the surprise was twofold in the coverage: iOS 15 runs on every device that ran iOS 14 — including the six-year-old iPhone 6S — and, breaking with previous releases, Apple is letting users remain on iOS 14 while still receiving security updates rather than forcing the jump.
That choice set a pattern the related coverage keeps confirming: legacy patch trains became routine with releases like iOS 12.5.7 for the iPhone 5S and older Macs and continue years later with iOS 12.5.8 stretching iPhone 5s support past a decade, while Apple's [[a:866855|UK compliance statement committing the iPhone 15 Pro Max to at least five years of security updates]] turned an ad-hoc courtesy into a disclosed policy.
First-order effects
- Owners of older devices — down to the iPhone 6S — can defer the iOS 15 upgrade without losing security patches, removing the traditional choose-between-features-and-safety tradeoff.
Second-order effects
- The opt-in legacy track lowers upgrade urgency for the installed base, which matters because Apple's own adoption figures later show meaningful laggard shares even years into a release cycle (79% of all iPhones on iOS 26 by mid-2026).
- A year later iOS 16 cut back to the iPhone 8 and newer, making the security-update-without-upgrade path the safety net that keeps dropped devices patched instead of stranded.
Third-order effects
- Security maintenance decoupled from feature upgrades is hardening into Apple's standing model — separate version trains for old hardware plus minimum-support disclosures — which lengthens effective device lifespans and strengthens the resale-value argument commentators like Quinn Nelson were already making about iPhone ownership.
The trend: iPhone software support is splitting into two tracks — feature upgrades gated by hardware age and security patches extended almost indefinitely — turning long-term update commitments into a competitive and regulatory benchmark.