Takes less than 10secs to change my battery
Now that sir is pretty amazing!
My single 18650
mods require a coin and lots of fiddling to get open let alone the time required to get/find a coin.

Then there's the getting the battery and threads lined up and

the coin again. This is assuming of course that I actually carry extra
batteries with me (which I never have).
(does it help that I'm a clutz?)
The dual's do last much longer than the singles - I have gotten over 40,000J on a dual Boxer- enough to last all day and then some.
Who was it that had the battery that swapped similar to a cordless drill? To bad that did not catch on.