Try this link: https://en.wikisource.org/wiki/Special:UnconnectedPages?page=Author%3A-&submit=Go

Smart thinking (with elements of "d'oh!")

Then maybe we would do well to try and have something as default text added into [[MediaWiki:wikibase-unconnectedpages-summary]] that maybe automatically populate local user namespaces with their local names done dynamically.

Having something helpful that locals can better adapt is better than nothing (IMNSHO).

FWIW I now have

<!-- Transcludes into [[Special:UnconnectedPages]]-->
At present there is no ability to filter by namespace, so these are pointers to the start of relevant namespace sections
<div class="hlist plainlinks">

• [{{fullurl:{{FULLPAGENAME}}|page=Category:-}} Category]
• [{{fullurl:{{FULLPAGENAME}}|page=Portal:-}} Portal]
• [{{fullurl:{{FULLPAGENAME}}|page=Author:-}} Author]

</span>

In T68153#691976, @matej_suchanek wrote:

Try this link: https://en.wikisource.org/wiki/Special:UnconnectedPages?page=Author%3A-&submit=Go

Unfortunately this don't work anymore. There is any special reason for removing a feature instead of improving it?

@555 I suppose all removed functionalities will return back when all developers' work is done. I'm not happy about this either, however the page is now sorted by page_id rather then page_title.

Yes. As I announced we needed to remove those features because their performance was so bad that it could have become an attack vector. Fixing this had highest priority. We're tracking bringing back features at T102816.

Change 233325 had a related patch set uploaded (by Ricordisamoa):
[WIP] Add namespace selector to Special:UnconnectedPages

https://gerrit.wikimedia.org/r/233325

Change 233325 merged by jenkins-bot:
Add namespace selector to Special:UnconnectedPages

https://gerrit.wikimedia.org/r/233325

I don't think the new feature will have any noticeable performance impact since pages were already being filtered by namespace.