Nice article. I’d be kinda worried that that approach would mean that the overall UI doesn’t snyc with the illustration style. As in the illustations were an after thought and just injected into the site without much gel whilst designing the site. Tbh, I felt that seeing the zendesk site even before reading the article.
I agree that trending illustration styles change constantly, that’s a always gonna happen, but I don’t think it’s as easy as just changing the illustrations to keep it fresh. I feel the general UI and typography needs to sync with it too.