Yes, we should be looking for
gksu and fixing them, at least on canonical questions. However, this fix needs to be a multi-faceted approach.
First off, it's important to know why
gksudo doesn't come with Ubuntu anymore. You're more than welcome to read this whole post, but I'll just trim the fat:
gksu is not recommended any more and it may be removed entirely from future issues of Ubuntu. In general the development team would prefer us not to use GUI applications as root but to use sudo and the command line instead.
Now, it's important to take this with a grain of salt, because these are developers after all, and developers aren't always the best at knowing what's good for noob users.
Therefore, we can begin to design a multi-phase solution:
gksu is used or exists, we can add a little note saying effectively the following:
Since Ubuntu 13.04,
gksu has been deprecated and is no longer installed by default with Ubuntu. It is recommended that you use alternate ways of doing . If you absolutely need this package, run
sudo apt install gksu.
However, this doesn't exactly solve the problem, as there's a very clear reason as to why
gksu is no longer really recommended. Just throwing this on won't help people, and might in fact cause weirder problems down the line (plus the fact that
gksu might stop existing any moment).
Encourage Use of Specific Tools
Source management can be taken care of using the GUI "Software and Updates" tool, which is far less risky to users if something goes wrong. Similar tools exist for other Ubuntu components. If nothing of the sort exists, it's probably something your average run-of-the-mill user should be doing, bringing me to the next point.
Just Learn The [CENSORED] Terminal!
If a user is trying to do something pretty advanced, there's no need to take root actions from the GUI. If this is the case, we can just get rid of
gksu gedit and replace it with
sudo nano or whatever preferred text editor.
This option also encourages some UX friction for root actions, which is a very good thing. Root powers are dangerous, and should be isolated. By letting any user get access to root through a GUI, it might open up a huge window to allow even more problems to sneak in (e.g. "I accidentally deleted /etc from my file manager because I had a root Nautilus open and I didn't know that it was a root one. Halp!").
As for why, see that the Ubuntu dev team says, and what this answer says. In short, root access from the GUI is bad, and
sudo in the GUI is also bad.
In short, yes, we need to get rid of
gksu and replace it with either the proper GUI solution to the problem, or a command that can run fully in the terminal. Using
sudo to bring up graphical things is just a bad idea and can lead to so much trouble that it's just not even a good idea to try.