Likely due to the musical acts, the series hasn't been able to be released on DVDs. It's even more frustrating when you consider the fact that its spin-off, The Amanda Show, has at least 3 DVD releases.
It's more apparent by the time it started to get rerun in both Teenick's "The 90's Are All That" and Nick at Nite, that the musical acts got cut off. So, sadly, it also condemns some sketches leading to them and also the credits, since the cast said goodbye at the end of the musical act.
Curiously, a before example of this when the series was still rerun in The N (before the eventual change to Teenick), was that in one episode from season 4, the musical act of JoJo was replaced with another Vital Information sketch.
It's a bit weird that the first season hasn't really been touched by the programming in the block as well.
Both the 100th Episode special and the 10th Anniversary Reunion Special were filmed in a hour and not in the usual 30 minutes program. Sadly, the original airing of both of them had to be edited in their respectful reruns, and/or home releases.
No Export for You: Granted, it is from and was aired in the States, but did you know it was aired in Spain? Or in Mexico (and also great part of Latinamerica)? Oh, but heaven's forbids, only the first season (and 3 years late) was aired in the latinamerican Nickelodeon channel. Maybe the series only worked in the original language rather than dubbing it... Completely an aversion of its spinoff and sister series, The Amanda Show which was aired (again, several years later from its original airing)note Maybe, because Retroactive Recognition that Nick knew would work, since both Drake Bell and Josh Peck starred in this series before thier breakthrough in Drake & Josh.
The Other Darrin: A season 9 "Good Burger" sketch cast the new (& tiny) performer Ryan Coleman as Ed. The fans did not react well.
Possibly lampshaded in the 10th anniversary reunion. Kel reprises Ed, who (among other things) inadvertently and horribly injures a co-worker. Said co-worker is played by Coleman.
Also, in the Superdude sketches, Penny Lane was originally played by Angelique Bates. However, after she left the show, Alisa Reyes filled in the role. Also counts as a Race Lift, as Bates was black, and Reyes was latino. Later African-American cast member Christy Knowings played Penny Lane.
Also in the Superdude sketches, Katrina Johnson played the little Ms. Exposition and Amanda Bynes took this role after she left.
Series Hiatus: The production hiatus break that the show had in between what people often refer as 'The Golden Era' (1994-2000) and the 'Relaunch Era' (2002-2005) was during the TV season of 2000-2001. That period of time was filled with 'Best Of' episodes of some of the cast best sketches to fill the time spot.
Star-Making Role: As previously noted, this launched the carriers of Kenan Thompson, Kel Mitchell and Amanda Bynes with their respective spin-offs.
Written By Cast Member: Though sketch comedy series as Saturday Night Live counts with a Cast Full of Writers, All That wouldn't because the majority of the cast were under 18 years old. However, during the last season of the original run of the show, Danny Tamberelli and Mark Saul DID wrote some of their sketches. They are even credited in some of the episodes of that run.
Tamberelli even added in one of his recent interviews that they were indeed getting paid of writing, especially him since he was almost 18 by the time, so it wasn't that sort of a problem.