User blog comment:Knarrow02/Do you think Phineas and Ferb deserve a 5th Season?/@comment-25586419-20150105195715

I pretty much agree with your reasons. They've done a good job at keeping the show fresh and exploring new story lines. Not many long-runners can do that. It would certainly seem too soon if the show ended now. I have a feeling that Dan and Swampy have something planned, whether it's a new season or a spin-off, etc., I have no idea. I just hope it happens and that no unforeseen circumstances get in the way of it.