In the comments: People who didn't read the article assuming they were literally building 800GB images (the example in the article is an 11GB image that was amplified by copying behaviors)
They say they made a 800GB container image, so your issue is about singular vs plural?
Regardless, I don't really get why anyone would self report like this. Is next article going to be about how they don't encrypt passwords and when they accidentally dropped prod DB they could restore account from logs because it had the passwords in clear text?
It's not, it's an 800GB image caused by multiple full writes of an 11GB file into the image's layers. I read the article.