At my company (SWA) we are not authorized to use AB1, not sure why. Also if we're using AB we have to use at least the minimum that provides a positive stopping margin based on landing performance data. So in some cases, KMDW in the summer for example, even dry the numbers will require AB Max which discourages most people from using them. I would think it would be prudent to use 3 or even 2 so there's no delay in applying brakes but without the aggressiveness of Max. Since 1 is so tame why not just make 1 equal to what 2 is now, same for 2 equal to current 3, have 3 be somewhere between current 3 and Max, and keep Max where it is now?