gwhizkids
macrumors G5
The point is not the overall duration, it’s the difference between the two versions. From 14.2.1 to 14.3 I noticed an improvement in the battery, from 14.3 to 14.4 not only the battery got worse but it is also less consistent. Within the same day it passes from a standby consumption of 0.4%/h to 1%/h without using it.
Aside from the academic interest, who cares? There are lot of iPhone 7 users out there who would kill for 4 days of standby power.