Apple isn't coy about all this! #TimApple's 2019 shareholders letter spelled it out explicitly: Apple's revenues are falling because its customers are fixing their phones rather than replacing them:
https://www.apple.com/newsroom/2019/01/letter-from-tim-cook-to-apple-investors/
Apple led the coalition that killed dozens of state #RightToRepair bills for *years*.
21/
When repair advocates pointed out that this was creating mountains of immortal #ewaste that included tons of #ConflictMinerals, Apple's religious adherents stepped into insist that Apple customers *preferred* to get their iPhone fixed by Apple and its approved depots.
22/