Awful. both iOS and macOS 26 (which I've been running regularly since the early betas) are so buggy (including visually) that I decided to skip them on my main devices. Last time I skipped a major OS update, OS X was still paid. We’ll see what happens next year, though I have no illusions Apple learned anything from this debacle.

I updated my iPhone 15 Pro yesterday. The only performance issue I noticed is when making a new wallpaper, with the "Dynamic iOS 26" wallpaper. It was lagging like crazy, it even froze at some point, and the phone got very hot. I have a feeling it hit the battery like a truck, too, but we'll see in time if it was just one incident or what. Running full animations and graphics, and glass icons, no performance issues.

Just managed to click update on my iPad Mini 6th gen, we'll see how that goes. The M1 Air will have to wait some more.