True, but if it's so cold that you have almost no regen, a larger pack will take longer to warm up enough that it's no longer regen limited. Simple physics.
No.
For every degree the pack warms up, the battery that is twice as large will provide twice the ability to absorb regen power. (Voltage is constant in both scenarios, the current the battery must accommodate is a smaller fraction as a compared to it's power delivery/acceptance capability the larger the battery)
Thus while the larger battery warms up at half the rate, it provides twice the regen capability at any given temperature up to it's max, and the curves end up (roughly) equal.
Simple physics indeed.
But that's not why I support buying the pack that suits your needs. It just makes sense from multiple levels to not buy a substantially larger pack than the one that suits your usage. This should be obvious and as charging becomes more ubiquitous and faster, it will only make more sense to not be lugging around an extra ton of batteries you don't need.
Assuming you are no longer standing by your earlier assertion that "usage needs" = "daily driving" needs, then I don't disagree.
However, When you factor in the needs of many:
-Need to drive in the cold, resulting in 30-50% greater energy usage
-Need to tow: 50-100% greater energy usage
-Need to mount a roof rack/box: ~20% range hit
-Need to account for elevation change
-Need to accommodate headwinds
-Need to drive through snow/slush/heavy rain
-Need to use the cabin heater significantly
-etc...
Then the scenario changes. Especially if you face more than one of these factors in a single trip. These may not be daily needs, but they are
regular needs. Today's 300-400 mile EV range packs are great strides. But wanting 500+ mile range packs, which will do 200 in reality for the family vacation up the mountain through the snow in sub-freezing weather with the ski-rack on top will be welcome....