It seems fair to say that since the release of iPhone 6, A-series processor updates have been more for future-proofing purposes rather than present necessity for the average user. As a result, biennial upgrades, let alone annual iPhone swaps, became increasingly rare — demonstrated by ever shrinking Apple Store lines proceeding a new launch. Now, the anecdotal findings are being corroborated by industry analyst Toni Sacconaghi from Bernstein, who says that the average iPhone upgrade time has increased to four years, up from three years in fiscal 2018.
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