Hi there, and welcome! Actually, I never encountered the hard character limit, which as founder @tobias noted here is set at 24000 characters. This is not to be confused with the soft limit of 1200 characters, which isn’t enforced, but more of a suggestion.
Supernotes is designed to promote taking atomic notes, a short form of notes that carry one and only one central idea. It is, in my experience, a powerful way of building a pkms that enforces that only the essence of what matters to you is encoded, while information is easy to grasp on retrieval.
Going back to your example of extracting knowledgefrom Wikipedia, personally, I would apply the atomic notes schema in that I would isolate assertions from definitions, and represent each one of those in a dedicated note. Together, these notes could be grouped within a shared parent for instance.
That being said, this is, of course, just my personal approach, and I have to admit that I did struggle at first with atomic note-taking. But it’s definitely worth toying around with the idea.
PS. When I was on my hunt for the perfect tool for pkm, in the late 2010’s, there were very few sophisticated solutions apart from the big fishs like evernote or notion. It’s amazing to see what a plethora of tools you can find today on noteapps.info. Thanks for sharing!