It was a nonstop barrage of "Unexpected item in the bagging area!" on repeat until you just give up and walk out the door leaving everything behind for the store to clear away for the next customer.

The big improvement has been image recognition on produce. It used to be you needed to either know the produce code, or navigate a terrible menu system. Nowadays, you can just put stuff on the scale, hit the camera icon, and have it show you a few possibilities, which is almost always correct.

There was also a long period where the anti theft system would trigger if you breath on the bagging area, and require a staff member to unlock it. They seem to have toned that down a lot. Even when it triggers, it just nags you without locking anything.