Looking at <https://dumps.wikimedia.org/enwiki/2015040370101/> currently, I see:
```
2015-04-06 22:06:17 done Recombine a2017-01-02 21:16:30 done Articles, templates, media/file descriptions, and primary meta-pages, in multiple bz2 streams, and primary meta-pages.100 pages per stream
enwiki-2015040370101-pages-articless-multistream.xml.bz2 11.0 GB3.5 GB
```
I personally always avoid this dump because it's so infuriatingly ambiguous about what it does and does not include. Does "templates" include Scribunto/Lua modules? Does "primary meta-pages" include pages such as customized MediaWiki messages?
I think it may make sense to do away with the "pages-articles" dump altogether, but it's unclear to me how much of a breaking change that would be.
Instead of dividing seemingly arbitrarily, we should instead divide by `page.page_namespace`. For people interacting with the dumps, I think such a technical division would be quite useful. I somewhat regularly get asked to do dump scans of just a particular namespace. Even if the requests were for multiple namespaces, I could pick and choose what I need and don't need more easily.
For all namespaces, we have "meta-current" of course. This is sufficient.
This task is vaguely related to {T20919}.
It may make sense to do away with the "pages-articles" dump altogether, but it's unclear how much of a breaking change that would be. We could just leave it alone for now, but that would take up more disk space.