Which official LEGO stores have the largest selection of bricks in their PAB wall?
I cannot seem to find the official press release for Berlin flagship store re-opening in 2017, however various sources1, 2 state at that time it had the Europe’s largest ”Pick &amp; Build“ wall. Latest news I could find related to this particular shop wall is couple of months old (in German). There's a picture representing all parts available for PAB with 144 parts/bins.
I've also found following picture on Imgur via Reddit post, showing the size of PAB wall