My wristwatch from 50 years ago can be submerged to a depth of 300 feet. I am sure companies that can assemble microchips have no trouble figuring out the technology from half a decade ago when they have to.
> I hope this doesn't affect water-resistance, which I (and everyone I know) care much more about a hypothetical replacable battery
I have not taken my phone diving yet, but I (and friends/relatives) have had phones which would have lived another year or two if the battery was easier to replace.
> battery that we won't probably ever need in the lifetime of the device.
The goal of the law is to reduce e-waste. It would be nice if all aspects which dictate the lifetime of a device (e.g. software updates) were extended as far as possible.