Certain apps wouldn’t run on devices without Android 4.0.
Google Chrome required Android 4.0, so devices that were never upgraded from Android 2.3 Gingerbread still can’t use Google Chrome today. Android 4.1 was also extremely important, making the interface much more smooth and less laggy with “Project Butter.” Compared to Android 4.0 and Android 4.1, the most recent versions of Android are minor updates.
Of course, the worst case scenario would be if you first rebuild your indexes, which also updates the index statistics by scanning the entire table, and later you run UPDATE STATISTICS using the default values, which again updates the index statistics but this time only with a default and smaller sample.
Not only you are updating your index statistics twice but you are overwriting the better of the two choices.
As mentioned before, if you rebuild all your indexes then all the index statistics will also be updated by scanning all the rows on the table.