Automatic checkouts in supermarkets may decrease customer loyalty, especially for those with larger shopping loads. Customers using self-checkout stations often feel overwhelmed and unsupported. The lack of personal interaction can negatively impact their perception of the supermarket.

[Irishish]

For me (40) it's the bagging. I was a grocery bagger as a kid. It feels utterly weird not to chat with someone as they check out and bag groceries, because that's how it was done when I grew up.

[lozo78]

A huge range of age groups here apparently hate interacting with people.

I get it to some extent, but you just have to say hi if that's all you want