Sales-wise, Apple's current generation of devices may be the most lukewarm the company has put out in the recent past, and the fact that the cheapest device of the lot is the best-selling is unlikely to be considered a positive by the company's executives.
https://www.notebookcheck.net/The-iPhone-XR-has-been-the-best-selling-Apple-smartphone-since-it-was-launched.374421.0.html