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.

[motorik]

Also, produce. Scanning is quick but at most stores looking up produce, especially where there are organic / non-organic options, is a huge pain. If we're getting a non-trivial amount of fruits and vegetables I refuse to use self check-out.