It breaks the unwritten "3 Season" rule most shows** end at.
Hmm...
G1: 5 seasons (technically, but that has a few asterisks of its own)
G2: 2
Beast Wars: 3
Beast Machines: 2
Robots in Disguise 2001: 1
Armada: 1
Energon: 1
Cybertron: 1
Animated: 3
Prime: 3
Rescue Bots: 4 (BOOYAH)
Robots in Disguise Deuce: 3
Rescue Bots: Academy: 2
Cyberverse: 4
Earthspark: 2(?)
...do we count the Machinima stuff? If we do,
how do we count them? Six series, or two series of three seasons?
Anyway, of the 15 series named, only 4 ended at the 3-season mark, or 26.6666667%.
Also, not trying to call you out on that or anything, I was genuinely curious what the statistic is.
(And say what you want about including G2, but since it was just G1 retreads, they clearly had enough to go three or more seasons if they wanted to, and it brought the number to a nice, round 15 series.)