Only in the beginning, when self checkout stations are being introduced and most of the customers go to cashiers, out of habit. Thing is: even a person that do

Only in the beginning, when self checkout stations are being introduced and most of the customers go to cashiers, out of habit. Thing is: even a person that does self-checkout quite often is still much slower than a cashier, who has 100x more practice. Also, when anything goes wrong with self-checkout you typically need to wait for someone to get to you and fix the issue - cashiers typically are able to fix their errors themselves. So, in the end the lines will be longer, because of less skilled people doing the work.