The author did design for Gen-Z aesthetics. At the end of the post, he says they may even complete the feature.
I had fun reading it but I feel it is a bad business move to attack your user base, and I assume that they have more users around the 18yo of the spectrum than 75.
Would he also make fun of a boomer mode, with large buttons everywhere and "get me out of the app and just call person" feature?
There is a way to design a more "fun" experience but just slapping the biggest tropes on like your users are 5 year olds is probably not it.