Thanks, I agree that each sidebar/toolbox item needs assessing: bug 64321.

(In reply to This, that and the other from comment #0)

The link "Related changes" is rarely used (seriously, how often do you find
yourself using it?)

Very often. In particular, it's crucial when looking for template vandalism or changes in categories and should be made more obvious. Closing this because you've not suggested an alternative location and I don't see where else it could be put.

(In reply to Nemo from comment #1)

Very often. In particular, it's crucial when looking for template vandalism
or changes in categories and should be made more obvious.

What? Make it more obvious?

I would content that this is the least used of all sidebar links. Without any statistics, though, it's a difficult point to justify.

(In reply to Nemo from comment #1)

Closing this
because you've not suggested an alternative location and I don't see where
else it could be put.

(In reply to This, that and the other from comment #0)

This link should
be moved perhaps to the action=info display, which is available through the
toolbox.

Yes, sorry, I meant that we need a position that is understandable and lets those who can benefit from the feature actually find it (even if they don't know beforehand about it), and action=info is too unrelated. Currently the toolbox mostly contains navigation-aiding features related to the page you are in, so it's the most logical fit and I don't see a problem with the feature being there.

Part of the use case of related changes is connected to action=history, but adding a new tab next to history is not so feasible. In the end we may need something like a "Recommendations" area for all this sort of stuff including related changes, whatlinkshere and https://meta.wikimedia.org/wiki/Requests_for_comment/Interproject_links_interface