I feel like there are issues here which are perhaps not being completely understood by those commenting?
The charcoal in Dennis' short rib cook did not extinguish- his only concern is that the burn was uneven. As Dennis L has said, in a low and slow/ indirect cook there is no reason to be concerned about how even a burn is... the end result is exactly the same. The heat distribution is even in an indirect cook- the whole KK is heat soaked, and which bits of charcoal are lit doesn't much matter. I've certainly never sat there 'reading the charcoal' after a long low and slow cook!
As Dennis L has said- different issue if you are cooking with direct heat when you are grilling over the charcoal. In that case you've usually lit lots of spots, and things progress hot and fast, and you can see the fire (as you are grilling), so you won't have a problem!
I've only ever had a single episode of my charcoal actually going out on a low and slow cook (a different issue from Dennis' problem above). In that case it was a low and slow cook, and I had lit a fist full of charcoal roughly 1/3rds from the left edge of the basket- and quite bizarrely it burnt gradually towards the left of the basket, and having burnt all of the charcoal in that spot, then there was no way back to get to the other 2/3rds of the basket.... So now I'm more likely to light towards one edge when cooking low and slow (especially if overnight when I never get up to check!)