Self-checkout can be extremely convenient if it's done with a handheld scanner as you shop, as my local supermarket does. I can walk into the store with my backpack, fill it with groceries, see how much I'm spending (and whether discounts have processed properly) and then pay in a few seconds at the exit. The only minor hassle is if I'm buying alcohol I have to wait for someone to verify my age. And if I spend less than £20, I can even use contactless payment. Unfortunately the current system still requires a few steps to pay, but theoretically I could just beep my card and walk out.
>or pumping your own gas at a gas station.
Because they haven't really automated anything but the payment. If you could drive up and have a robot arm fill your car, it would be very convenient.
I'm much more invested in how long it takes these things to be done than an hourly wage earner.