I've been in Massachusetts for a while, which is a small American state. And guess what? 20 years ago there used to be many more local supermarket chains, that over time were increasingly absorbed or destroyed by massive national chains. I feel like this same story plays out all over the world, except that when you have countries like in Europe it feels like a more personal type of event e.g. "those foreign superchains are out to get our local wholesome stuff." But in reality maybe it's mostly just business.