Maybe they are closing for the same reason Walmart is pulling the last of its stores from Portland. Theft.
No, it's just that these stores are extremely expensive to operate. All the cameras, GPUs, power, network, etc... the economics just don't work. And on top of that, in order to make the customer believe they never fail, they do have manual checks (which is why sometimes you get the receipt immediately and some times it takes 15 minutes).
Also, they (same with competitors BTW) never got them to work at scale, and I by scale I mean number of people that can be at the store at the same time, square meters or even number of SKUs.
I worked at one of their competitors for a while, BTW, so I saw some of the problems first hand.