One post per device for rooting questions is OK. Don't even make them CW, this only prevents people from answering because they don't get any reputation. They will automatically become CW when it's time for it.
I am very unlikely to root my device, so I don't really have any skin in this game.
That said, I do believe the current canonical question is getting too big and unwieldy.
I think "How do I root device X" or, even better, "How do I root Y class of devices" is a good way to go.
I'm concerned, though, about the different ways one can root a device. I would ...
All entries in that post should link to questions on our site now. If you see any that don't, please remove them :)
Feel free to post a question asking how to root your S4, assuming there is not such a question already. When that question is answered, either by yourself after you figure out the process or by someone else, then it should be added to the ...
This was my doing. I saw your (deleted) meta question about why your answer was a CW. I didn't think it deserved to be a CW answer, so I reverted it back to a normal answer. Any further edits should not make it CW again unless a mod reverses it.