As time goes by and new generations of anime watchers emerge, so too does the way that they judge the series they're watching. Many popular anime from past decades —specifically, the '90s — no longer entertain audiences the way that they once did. However, for every one of these outdated '90s anime titles, there are countless more that have aged like fine wine.
Source：https://www.cbr.com/greatest-90s-anime-improve-over-time/
