UI polish and runtime performance, as I've mentioned. I said "seems to" because I only see the effects: the Cupertino widgets, and the marked performance differ

UI polish and runtime performance, as I've mentioned. I said "seems to" because I only see the effects: the Cupertino widgets, and the marked performance differences on Android and iOS (see the Alibaba article). I don't know whether this is purposeful or a side-effect of something else.