iOS 18 holdouts: 18.7.7 is out now for devices that were eligible for the 26 upgrade. You should upgrade immediately. The security updates are significant. https://www.macrumors.com/2026/04/01/apple-ios-18-darksword-security-update/
Apple Issues Rare iOS 18 Security Update to Protect Against DarkSword Exploit

Apple today released a new build of iOS 18.7.7 and iPadOS 18.7.7, presumably with a fix for the DarkSword exploit. Apple told Wired that it would...

MacRumors
@misty Gah! I upgraded my iPad (9th Gen, from 2021) last week, and - aside from how much I dislike the UI - it's just incredibly slow now under iOS 26. I've never downgraded an Apple device before, but this weekend I'm going to give it a try...

@sunpig is downgrading ios possible?

@misty