In 1999, twenty-five years ago, when "Marinopoulos" was a leader in the Greek retail market, having brought the supermarket fashion to Greece, first with Prisunic Marinopoulos, then in cooperation with Continent and then with Carrefour, while next to it were also developing historical Greek chains, such as "AB Vassilopoulos", "Veropoulos", "Sklavenitis" only in Attica and "Masoutis" in Northern Greece, one could hardly imagine that two of the above chains and about 60 others would no longer exist in 2024. It is even more difficult, perhaps, to imagine that at the time of the stock market boom, a German discount chain, which sold its products on pallets in stores and started its journey on the Greek market from Thessaloniki instead of Athens, would be in second place in the supermarket sector today. A milestone in this last 25 years was the collapse of the "Marinopoulos" in 2016, as it led to the sudden growth of "Sklavenitis", which from a large chain, but with a reach only in Attica, was transformed within a few months into the largest retailer in the country with activities in Cyprus. Now "Hellenic Supermarkets Sklavenitis", which includes only the activity of Sklavenitis stores in Greece, has a turnover of 4.3 billion euros, while the group as a whole has exceeded 5 billion euros in turnover, reaching 5.16 billion euros in 2023. Three new factors are particularly important for the sector, which is expected to intensify in the coming years: e-commerce, ordering and distribution platforms (efood and Wolt), which are also developing their own supermarket network, and convenience stores.