@groceryheist @mako I'm burning all my mana on my Chinese-speaking friends to get me some insights, since I'm still at least five years away from answering them myself 😅, hopefully y’all will have more luck.
I dig what you say about variability on Wikia. My hypothesis, having looked at just a few nation-grade Wikipedias, that stable linear growth is what I expect to see (new articles created, old articles freshened), and that other, smaller, Wikipedias may have that, rather than RAD. Will look.