Ask HN: How does Apple do UX research?

It seems that the tech community accepts certain dogma in releasing products "MVP, agile, user-centered design, user studies, etc". Yet if these principles are being followed, why does the industry keep pumping low quality products, while Apple is the opposite? Apple's secrecy does not help. The few articles on google were either outdated (Job's legacy) or blog with opinions and speculations. What are they doing right that most tech companies miss? Or is it not design, but a distinctive leadership and strategy that works? Some "more verifiable" sources: [1] https://ux.stackexchange.com/questions/40448/how-does-apple-manage-to-deliver-its-user-experience [2] https://www.youtube.com/watch?v=o3uR6IDSHSM Would love to hear from insiders if possible, thanks.