I dont think this is something that should be fixed editorially, that is to say: us.

We would spend weeks changing apt-gets, holding debates over whether a question is server- or desktop- orientated and it still might not be easier for somebody to install multiple packages the way sudo apt-get package-1 package-2 package-3 can.

Picking one or other isn't going to make everybody happy and enforcing it isn't going to make our lives any easier.

However, I'm not saying this isn't a feature we should leverage. Would it not make a certain amount of sense to have a little bit of javascript (and it would be quite small) that searched the page for apt-get install xxx and replaced xxx with a link to apt.ubuntu.com, or added an icon next to it that users could click to install.

In the same vein, we could do something with JS that just made a link direct to apt://xxx but apturl could do with some attention to make it work a little prettier.

To deal with PPAs up until now I've been writing it out as a command using add-apt-repository. A similar JS-search/replace thing could be used here but it would only serve as a help box to show the user a non-CLI method of adding the repo.

And while we're at it, we could have something that replaced -->, -> with ▸ (per the unified style guides).

These are all things we'd need to sort out with StackOverflow but they're trivially easy that I can't see them having a problem with them.