7:05 AM
It seems that there are SEDE queries which could help to compile such a list, as this Google search suggests.
My take on importance of tag-wikis: They are important for tags, where the usage is not clear. For example, even without reading a tag wiki, probably any user would see that the post is about algebraic topology and would use the tag for this area.
But if some guidance is needed when using a tag, it is better to be placed in the tag-excerpt, so that at least some users notice it. (Such as the examples of deprecated tag shown above.)
Example from MSE (since I am much more familiar with the tags here). It was agreed that (differential-equations) will be used only for odes and pdes will have a separated tag. But this is definitely not clear just from the name of that tag. So this information is displayed in the tag-excerpt.
There are also a few comment templates, which can be used for incorrectly tagged questions. (And the list there also can serve as a list of tags which are frequently used incorrectly.)
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