This article doesn't make any sense. The use of metaphors worked when people didn't know what a computer was, and the only way to make its UI make sense was to mimic real-world objects. Now, this is no longer necessary. It's been 40 years. While I agree that new macOS icons aren't great (see the Game Center icon), the old ones were silly. I'm 35 and I have probably seen an actual contact book only once when I was lit…
These historically grown metaphors make lot of sense, where it comes to how we relate to objects. The word "camera" isn't only short and distinctive, it's also evoking a sense of the history of the medium, and it may provide some emotional bonding to the object which may hardly be achieved by a "multi-image" – while the latter may actually sound a bit fancier in a 1970s SF-movie. I think, there are some valid points made by the article, and, besides, on an empirical level, I'm losing time in the newer, uniformed MacOS GUIs, too. (Not to speak of Miller's magical number 7 or 3.7 bits working memory, which are still valid in the age of flat design. But this is an other story.)