I don't think it's king ... I think it matters in some circumstances. The amount of time you spend at L3 chargers (in those situations where range matters most 'cause you're on a road trip) will be exactly the same regardless of battery pack size, except if you are driving far enough at just the right distance so that you can skip a charging stop. Realistically the Max pack will give 30% more range, so you might be able to skip one charging stop out of four. That's nice but not earth shattering.
Admittedly that does not factor in cold temps in Northern latitudes, or towing. Just sayin', for most people in most circumstances range is less important in fact than it may seem at face value.
Also: With a standard 7.2 kW home charging setup, filling the Max pack will take 20 hours! That's more than overnight. The Large pack has a sweet spot I think, at about 15 hours. My I-Pace's 10 hours is ok but could be longer, often it's done charging at 5 am.