@04c5d43c'll note that the issue with using Wikipedia as a source here is that forum software isn't really exciting for the kind of sources Wikipedia requires and lack of editors without conflicts of interest. For example, NodeBB was on this list for a bit, but was deleted for not having an article I think, and the article about it was deleted for lack of notability (since other than some blogs and what they publish themselves there aren't many sources).

Flarum seems to be hanging onto their own article despite not citing much besides their own sites and GitHub (and the author disclaiming having a conflict of interest due to being a contributor to Flarum), but they're also absent from the comparison.

I'll note that while both are also good modern options (and I personally preferr either to Discourse), both also use a lot of JS, so I'm not sure if they address your main concern.