The article in the link was an insightful analysis of the impact of Amazon's purchase of Whole foods on the grocery market, so I recommend it as a good read. One thing in the article caught my eye in particular. It seems that the competition reacted very efficiently to the purchase and stepped up their game, making their services better and lowering their prices. So, while Amazon hesitates to provide any real strategy on the company’s business model in the future, we are faced with an even fiercer competition which will be harder and harder to beat if some changes don’t happen soon.
https://phys.org/news/2018-11-foods-affected-grocery-business-year.html