It's so dumb that a standard hasn't been developed yet. Like AA/C/D, 18650 batteries, etc. They could have modular batteries with different sizes and capacities that work interchangeably.
From what I got from the article posted a few days ago, I believe it is by large a sustainability/climate effort, targeting all kinds of industry machinery batteries as well as phones. There is likely a bonus for end user usability, but that is relatively incidental.