Finland used to have a oligopoly of pretty expensive grocery chains and no price competition. Until Lidl (another German chain very similar to the Aldis) entered some 16 years ago and started real price competition. Of course with their efficient checkouts.
The first years Lidl didn't do so well. Then they changed the checkouts to the less efficient local models (and some other adaptations) and started doing pretty well. They just learned their lesson that in Finland you can sell the same product with a 30% premium compared to Germany and accept some inefficiency. Of course they are still a bit cheaper than the incumbants.
Finns are very proud of having defeated a multinational giant (and don't see that they have to pay for it). Like Germans have defeated Google when it comes to street view, although that price if there is any is more difficult to measure.