Has anything changed in the shopping search engines in the last 8 years?

8 years ago there was a rush to build shopping search engines, which were funded, built and sold to big corporations. These engines built custom scrapers and data feed aggregators. The data was not de-duped/normalized. Today we still have the same set of problems when searching for data.: not normalized, no rich attributes for most product categories, can't find all products at all stores, can't find the best price, don't know which is the best merchant to buy a particular product from, ...