The 'When Did This Become Hotter Than This' meme is a side-by-side comparison format used to contrast two different subjects, typically implying that the older version was superior to the modern one. While it started as a genuine expression of nostalgia or preference in fashion and automotive circles, it quickly evolved into a parody format. Internet users began using it ironically to compare absurd or humorous objects, mocking the 'back in my day' sentiment of the original posts. It remains a popular tool for social commentary on changing aesthetics, technology, and cultural shifts.