It’s irritating for sure. They’ve been around for long enough that 95% of shoppers should know how to use them.
I remember before these things came out. It would typically take forever to get through the line to have a cashier ring you up. There was always an old person in front of you that wanted to pay via check, which slowed the line down even more. How about the guy using his 2-way, on speaker, in front of you? That fucking chirp going on and on. What’s that? Someone wants to buy a lotto ticket, which means the cashier has to go to another counter to get the ticket and come back. Next, the soccer mom has 20 coupons she wants to use, half of which are expired or are for a different store. It was so much fun!
I much prefer the self checkouts. I can get through those within a few minutes. It sucks that those cashier jobs have mostly been eliminated. But that’s the price of progress I suppose.