that's honestly a good approach… I'd do the same

They could simply stop producing certain parts, sneak a specific custom piece somewhere, provide no diagrams or documentation for third parties to produce repairs. They could simply design parts that fail just after warranty. There is an app that goes with it, right there they have the chance to scan and sell your data, push ads to you, track your driving, etc.

I don't know exactly but there are more ways they can enshitify a product than my imagination allows.

You see, greedy people do not enshitify for sport, they do it for greed as enshitification means more money for them. So unless you are convinced Bezos put money here to help people and not make as much money as possible back, the only logical conclusion is that he wants to milk it as hard as possible, this is what he does.