The general attitude towards software updates has been perceived as a negative one. The reality is that if the contents of that update feature significant changes and improvements, users will probably jump on the ball to do an OTA pull. It was the case with iOS 7. Not so much with iOS 8 and the 8.0.1 debacle didn’t really help the case. This time around with iOS 9, we’re looking at an 24-hour adoption rate somewhere between the two.
Analytics firm Mixpanel has made available a tracking chart of all the active iPhones so far which have updated to iOS 9. You can pore over the data as it pours in every hour at the source link below. Mixpanel’s CEO pointed out to TechCrunch that one of the reasons the update package is well in demand was because it weighed in well below the previous one (1.3GB or less than a third of the 4.58GB for iOS 8). He also said that Apple’s servers are sweating to keep up with the demand. The data also shows real-time install rates for iOS 9 surpassed iOS 8 early today.
Many applications are still in the midst of making iOS 8.2-4 updates, so we’ll see what kind of catch-up game will have to be played here.