I’m really missing this feature. It’d be great to know what my wiki’s audience is seeing most often, and to know which pages we should prioritize.
The equivalent on UCP wikis can be found on the Admin Dashboard -> Analytics. There is a section for 'Top viewed pages', not exactly the same as Special:PopularPages but it's what we have.
Edit: you can also access the feature on Special:Analytics.
What do you think?