I use the self-checkout whenever the other lines are stacked, and sometimes just because I want to. I balked at first due to it being unfamiliar. The more I use it, the more I like it. I do not view it as 'doing their job', rather it's an alternative that saves me time, and that's a benefit directly to me. Further, when I bag my stuff, I leave the store with all of it and don't have to go back to get the bloomin' bag that was left on the carousel..... because the bagger didn't do a very good job.
At first I was not a fan. Now I am not anti.
Interesting: about two years or so ago a local chain grocery store put in a self-checkout lane as a test. After about three months they removed it because customers did not find it 'friendly'. OK, I live in Pennsylvania where the word 'change' is only welcome when you are exchanging money. In other parts of the country there are stores where there are no check-out lanes. Your card gets billed for whatever you walk out with.
It's an interesting world we live in, and there are parts of it I enjoy, as well as parts of it that I wish were the same as when I was much younger in the '60's.... Thing is, my opinion isn't going to change much, and it's not worth getting my shorts all bunched up if I don't like the way things are trending. I keep telling people that 'the good ole days' will return when we experience a major solar flare or EMP. There's a reason to keep that old car/truck that uses points! Now I am even told that the calamities we envisioned a few years back won't be so bad after all. I just keep watching things change and as far as technology goes, we seem better off now than we were several decades ago. As far as interpersonal relationships and human interaction, not so much. Guess it's all a balance. I'm glad I experienced the 'old days', but lets face it, fifty years from now these will be the old days remembered by the youth of today. I would not trade the memories of Elvis, the hula hoop, Pogo, the twist, doo-wop, the corner soda shop, and muscle cars..... and so much more, but they are history, as soon may be check-out line cashiers and baggers.
Just my thoughts - I'm sure YMMV.