In 🇫🇮 these mostly are hybrids: conventional checkouts plus a variable nr. of self-checkout points. Some chains have also portable scanners but only recently (I recall that in 🇸🇪 they have existed for years).
Based on my own N of 1 -experience I use the "human check out" slightly more often than machine. Why? Hmmm. The conveyor belt makes everything roll a bit smoother ;D
The BBC article, I understood, was maybe more about the totally or almost totally cashier-less stores.