I tried a supermarket in SH and the self-kiosks are for e-payment and card-only. I went to a physical cashier, and she didn't even have enough to cover change. This is somewhat an affluent area, so I didn't see anyone using cash. I suppose if it's a tourist area, it would be slightly less of an issue.

I swear that every time I tried to pay with cash, people look at me like an alien with 3 heads.