Apple has told Ars Technica that it always intended the iOS 14 security update option to be temporary. The iPhone maker has also pointed to one of its support pages that states that those continuing on iOS/iPadOS 14 will continue getting important security updates for a period of time.
Apple regularly stops signing legacy codes after a new iOS build is launched as it allows the company to keep more devices on feature-rich versions and it also protects users from hackers that try to use newly discovered weak links.
SharePlay, ProRes video for iPhone 13 Pro models, Lossless audio for HomePod Mini, and a brand new Mac OS are among the highlights of these improvements.