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It's official: Smartphones will need to have replaceable batteries by 2027
(www.androidauthority.com)
This is a most excellent place for technology news and articles.
At that point there's no way they can argue that the battery is user-serviceable without extra tools. Sure, they could argue that the law doesn't specify that they can't sabotage the device if you swap your battery but European courts have traditionally taken a dim view of that kind of tomfoolery.
I'm pretty sure that Apple aren't going to risk having to suddenly take all of their devices off the shelves. It's cheaper to comply.