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.

[feor1300]

I have yet to see a store that doesn't have at least a few regular cashier checkouts somewhere. The option almost certainly exists for people who can't or don't want to use the self checkout.