That description categorically applies to TiddlyWiki5 when it is run under Node.js to generate static HTML files from a wiki folder that contains individual tiddler files. Being able to operate in that configuration was a significant design goal driving the development of TiddlyWiki5.
Try clicking the links in those snapshots and you'll see that they have been mutated to point to the static renderings of each tiddler.
> They are better described at "static-page-generator" CMSs; another terms that's been used in the past is "baked instead of fried".
TW5 supports both baking and frying :)
> So, since a wiki page has to live-render which WikiWords are active links, it can't be baked
TW5 renders links according to the status of the target tiddler at the time of rendering. So, the italicised/non-italicised status reflects the state at the time of baking. That's OK, because it's generally better to re-bake the entire file set whenever the underlying tiddler files change.
Best wishes
Jeremy