They're taking over here in the Four Corners while AutoZone sits on their thumbs.
It's stupid easy to open a commercial account and then they'll deliver to you and you suddenly have access to a lot of oddball stuff next day (or 2-3 days if it's not at your closest dist ctr). The pro website is easier to navigate than their retail side, and the part interchange function is somewhat useful.
Around me they deliver to ranches and farms that only order once or twice a year (my drivers complain no one is around and they never know where to leave the parts). I'm down a BFE road on 35 acres and they bring me parts several days per week.
I say support 'em -- they're doing better and trying harder than 90% of retailers these days, which, admittedly, is a low bar.