Amazon bought Whole Foods five years ago for $13.7 billion. Here’s what’s changed at the high-end grocer

Five years ago, Amazon closed its $13.7 billion purchase of Whole Foods, by far the biggest acquisition ever for the e-commerce and cloud computing giant. Since then, Amazon has made a lot of changes to the specialty grocer, from lowering prices to embedding checkout technology in its 500-plus U.S. stores.

Amazon has opened 60 new locations, including one “dark store” entirely devoted to filling online orders. Yet Whole Foods still controls…