Aside from being more attentive with charge, another consequence of smaller battery is that you get more cycles per a given amount of total battery usage, and s

Aside from being more attentive with charge, another consequence of smaller battery is that you get more cycles per a given amount of total battery usage, and shallower cycles per a fixed interval of battery usage. All else being equal, a larger battery may be able to live longer. Personally I would like a larger battery because that means i can leave my charger at home, or even use a weaker USB-C PD on the go just to reduce the drain rate. The problem with the fuel tank analogy is that liquid gasoline is really heavy and your energy efficiency would drop dramatically, due to lugging around an extra 80 gallons of gasoline. That's not necessarily the case with a larger battery. You still have to carry the additional battery material, but the marginal costs IMO are nowhere near as high.