Is Superuser/SuperSU apps necessary for proper root?
I'm on stock E980 Kitkat and I just rooted my phone using the Root Tool for Kitkat (can be found elsewhere in the OGP forums). Everything went fine and the next step is to install SuperSU or Superuser from the Play store. This has been my routine all through my Android life: Root and then install a superuser app.
Well, currently I don't have any of these Superuser apps installed (honestly, I was in a hurry and simply forgot to install one) and everything is working perfectly fine. According to Root Checker, I have full root access. All apps who require root are working perfectly fine; maybe even better. Titanium Backup restored all my apps. No issues whatsoever!
So my question here is this:
In order to have proper root and for everything to qork perfectly, is a superuser app really necessary? Or can I just keep things the way they are right now (no su app) and expect everything to work just fine?
I've been having to reflash my rom several times because of certain root-requiring apps constantly force closing on me. I've had SuperSU installed while this has been happening and without an su app, these apps are doing exactly as they are supposed to. I'm now wondering if there is a bug (or just some other issue) in SuperSU or something.