Originally Posted by Hilbe
Can you tell us why we must wipe data? I'm just curious. Are there certain folders we can wipe to not have to do a whole device re-do?
Simple why: Because some apps will be unstable if you don't.
Real reason why: Some apps probably changed their data format a bit, making them incompatible with data from the older version.
In theory, you can go into app management and delete data for these apps, but there are almost 40 of them in this update. Sounds a bit dangerous.