* AdaptationDisplacement: At the time many youngsters staying up late would have seen 2021, long before even knowing a 2020 episode. Subverted of course if you were alive in the 70s, earlier 90s or now that both are equally available on DVD.
* AtlantisIsBoring: This is said to one of the main problems of the series.
* ComplainingAboutShowsYouDontWatch: This show seems to attract some of this from ''WesternAnimation/Sealab2021'' fans. Who will say 2021 was so much better but then back it up with statements that make it seem like they never watched 2020.
* LoveItOrHateIt: A general divide here on this show. Some regard it as a misunderstood series that deserves more love and some see it as a really boring show that is a snoozefest. This sometimes also brings in thoughts from 2021.
* VindicatedByReruns: In more recent times after the dvd release, there are various internet comments about people who remember finding the show boring in the 70s or on Cartoon Network, but since giving it another shot (and in a lot of cases now being older) they now enjoy the show a lot more than they ever had before.