I certainly understand the value of replaceable batteries. OTOH, I'm concerned about what this will mean for how many common upper end phones are IP67 submersion rated. I don't want that to go back to being a feature only of clunky super expensive phones, and I would rather have IP67 over a replaceable battery.
Now, if I'm lucky, they will mandate both a replaceable battery and that the phones be ip55 or better, after battery replacement.
Yeah great
“let’s just pass a law that says ‘no trade offs’, problem solved”
You will need to have a factory to replace the battery and also run tests to prove that the phone still works with water then
"I would rather have IP67 over a replaceable battery"
Not me, and not most people.
Just like how it already work with watches. You can replace batteries yourself, but waterproofing is not guaranteed. If you want to be certain that the waterproof rating is maintained, you have to sent it to an authorised service provider.