I wonder if this will finally take us back to the days of standardised battery sizes, instead of the random only-works-on-one-phone ones we get currently. I highly doubt manufacturers would want to invest too much for a single phone model for that long.

Agree it's a step in the right direction.

I worry about "commercially available tools". As it stands, lots of batteries can be replaced (at great difficulty and peril) with a heat gun and spudgers and patience. But that would be missing the point of this change.

Not providing software support for more than three or so years, is a planned obsolescence and should be made illegal.

Even better, consumers should be able to easily install alternative operating systems on old smartphones, just like one can install Bodhi Linux on a 15-year-old laptop.