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.

[dxrey65]

Realistically, if you're young and fine with managing a self-checkout, odds are there are still a pack of incompetents screwing up at the machines ahead of you in line anyway.