Might is the key word. I honestly doubt it will be like in the old days where you just pop the lid and put a new one. EU requires replaceable battery by the end user but it doesn't state how simply that can be done. Am expecting to see something like few screws at the bottom of the phone and stuff like that. But even that will be awesome.

People misunderstand this rule.

It's not about popping batteries out, but instead about making them more easily replaceable (so no gluing them in place kinda thing)

But even then it only applies if the battery degrades by more than a certain amount over the course of 2 years. If it doesn't, or if it's over a certain capacity, they don't need to do anything different.