Omo writes: "One of the neat things about being a fan for a while (I’d say at least 6 years) is the opportunity to see your niche fandom evolve. When I was watching anime in the 90s, there was no such a thing as “slice-of-life” genre. In fact the term didn’t really come into its own until maybe the 2004-2006 period, when iyashikei shows were hitting the late-night airwaves in full force."
Seinfeld could be considered slice-of-life when you think about it, so it seems odd that you only hear that genre when people talk about it in anime.