You mean an up-to-5% increase in capacity, and slightly decreased weight, depending on the product?

The truth is that the product with the 16% reduced capacity (Switch 2 Pro controller) is 7g lighter and the one with the 5% increased capacity (Gamecube controller) is 5g heavier.

Besides those two, the general idea is that the capacity is the same with 2-3% extra weight.

The 16% is for the Pro Controller though, to be fair.

The Switch 2 itself loses 1% of battery capacity, most other products none at all.

Your framing seems a bit selective to the point of being misleading.

How do those stats look 5 years later, when one is stuck with a degraded battery, and the other has had an easy battery swap?

seeing as the product itself already advertises that it's best to not charge it to 100% feel like nothing's being lost here no matter how one tries to spin it