This prompts you to buy another gadget from them, and they get to offer you a trade-in. That means that your old gadget gets "recycled" by Apple, who - uniquely among electronics manufacturers - drops all its "recycled" gadgets in giant shredders, ensuring that parts from old phones don't find their way into the secondary market for use by independent repair:
https://pluralistic.net/2022/05/22/apples-cement-overshoes/
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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*.
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