One question I have had in relation to G4 ending, is that are they still going to be making the you tube EQG series, because if they are doesn't hat still count as new material?
The Simpsons should have ended around the time that their movie came out, since that was the last time I actually remember any good material from them.
Personally I think a good run time for any series is around 7-10 years, with exceptions of course.
Besides our beloved characters will still live on just like Pinky said in the Real Pink Pony song:
It's funny, cause at this rate when we're canceledUs ponies will live on through brony artist's pencils