No, I wasn't criticising, Ana, just being practical.
People who want to chat can use the staffed tills; those who do not want to chat can use the self-service tills. It just makes sense to me. Why use a till with staff and then moan about chatting customers in front of you?
I mentioned staff jobs being saved because in the supermarket I use where there are both sorts of tills, there is one member of staff to cover six tills, whereas before there would have been three tills in the same space with three members of staff.
That's why supermarkets brought in self-service tills, and why I never use them. If the supervisor comes over and tells me there is a self-service till to use, I explain why I would rather not and tell her I know how to use self-service. They usually assume that someone standing in a queue of two does not know how to use self-service.