While true, I think cold temperatures might be the more applicable scenario. When the batteries are cold, the amount of power you can extract is limited, as is

While true, I think cold temperatures might be the more applicable scenario. When the batteries are cold, the amount of power you can extract is limited, as is the amount of power you can inject by regen braking. This is one factor that leads to crappy range in cold climates. Capacitors can smooth out the power curve - need 1000 amps of current for 4 seconds? No problem, that comes from the capacitors and the battery only sees a draw of 200 amps. Need to regen 600 amps for 15 seconds? No problem, dump that into the capacitors and recharge the batteries at 50 amps for the next minute. Knowing Tesla, they will use capacitors to offer both; a super-plaid mode that can supply 1800 amps momentarily, as well as better cold weather performance.