Self-service is a mixed bag. Yes, I like ATMs and Netflix (or Redbox). But I hate self-service at grocery stores especially if I'm buying produce etc. I'm not a big fan at home improvement stores much of the time either.
Ikea is simply far easier to self-scan. Back in the olden days you could scan your shopping in the supermarket as you put it into the trolley. Rather irellevent now when nobody does a "weekly shop" in person any more but far better than the "put into conveyor". Go back far enough and you used to have to ask someone for every item you wanted, no self picking.
[1] https://www.tradebit.com/usr/stock-photos/pub/9002/623344.jp...