On a planet where we can’t decide on the size of a sheet of paper, what side of the road to drive on, or what household current should be (and what an outlet should look like). How in the world can we have a planet-wide standard for batteries? AA/AAA/C/D sized batteries are the same across the globe. How did this happen?
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Replacing batteries can happen in any device regardless of what the other devices require. So it can gradually get replaced with just the cost of the new device (which probably gets bought anyway). Manufacturers can buy whatever is cheapest, and things produced in big quantities are usually cheaper. So you buy what everyone else is buying to put on your device (the bay that the batteries go into).
The other things you listed would all need a massive coordination and a lot of o e time cost to exchange all the outlets, devices, infrastructure. This is usually not happening.
For paper, there really is only 2 standards for most applications. We do have special battery sizes, just like spezial paper sizes, just not commonly in a private setting.
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