"Success percentage" means nothing, as everyone who has studied a little bit of statistics knows well. There are well-established methods to tell if a result is meaningful or not. In other words: P-values or GTFO.
How is that news? Choosing the download location is a feature that should have been there from the start; it is trivial to implement and deserves at most a mention in their changelog.
Or do apps programmers suck so bad at their job that we can't expect even basic functionalities from them?
So, apart from a meaningless renormalization that is only a display issue, everyone makes the same amount of money. Because they can buy the same amount of things, right? Congratulations, you have just invented communism.