Note that this continues to confuse MediaWiki users.

It continues to be a source of confusion. What would be a good resolution to this? I can see three possible options:

1. Remove the link altogether from Special:Statistics
2. Change the link to point to Special:PrefixIndex?namespace=0&hideredirects=1, which still works (but why is hiding redirects allowed there, if it's a performance issue on Special:AllPages?)
3. Create a new special page (Special:AllPagesNoRedirects?) which can be cached in miser mode, and link to that

Are these the only options, or does anyone have a better idea?

The second option would be fine for wikis using the 'any' article-count method, but I'm afraid it would be just as confusing as the current link on wikis using the 'link' method (since there's no way to filter out dead-end pages in the list).

ISTM the best solution (that has a chance of actually happening) would be to reveal on Special:Statistics

1. which namespaces contain content, and
2. which article-counting method the wiki is using (i.e., whether pages need to be linked or not).

The first bit of info would probably best be presented on a new special page that Special:Statistics could link to. The second could easily be revealed in a short sentence or phrase on Special:Statistics itself.

If we give users this information then we can link to Special:PrefixIndex?namespace=0&hideredirects=1 on all wikis, and hopefully it won't be as confusing to users.

(Sorry for somewhat "hijacking" this task… I've been meaning to create a new task requesting these changes I'm describing, but I just haven't gotten around to it.)

So, it looks like #1 (at least) in my comment above has happened.

I can't find the task that caused this change, but mw:Special:Statistics now says:

Content pages
(The main namespace, manual pages, and extension namespaces are counted as content namespaces.)

Can someone point to the relevant task?

In T228552#6102823, @Dcljr wrote:

So, it looks like #1 (at least) in my comment above has happened.

@Dcljr: On which wiki? mw.org still links, see https://www.mediawiki.org/wiki/Special:Statistics?uselang=qqx

In T228552#6610764, @Aklapper wrote:

In T228552#6102823, @Dcljr wrote:

So, it looks like #1 (at least) in my comment above has happened.

@Dcljr: On which wiki? mw.org still links, see https://www.mediawiki.org/wiki/Special:Statistics?uselang=qqx

Sorry… I think you misinterpreted my remark as alluding to #1 in Rchard2scout's comment at T228552#5847995. I was referring to #1 in my comment at T228552#5851487. The MediaWiki wiki now indicates on Special:Statistics which namespaces count as content. But as your link reveals, this is just a local thing.

I can confirm that this is still cause for confusion. I recently noticed it and asked the local sysops if they could fix it, they said no and led me here.
As for solution, I second the #1 suggestion from @Rchard2scout to remove the "Content pages" link - if there's no reliable way to enumerate the content pages in WP's current state, there's no point in trying.

Change 699171 had a related patch set uploaded (by Matěj Suchánek; author: Matěj Suchánek):

[mediawiki/core@master] Avoid confusing link on Special:Statistics in miser mode

https://gerrit.wikimedia.org/r/699171

Change 699171 merged by jenkins-bot:

[mediawiki/core@master] Avoid confusing link on Special:Statistics in miser mode

https://gerrit.wikimedia.org/r/699171