This is why wikis, which I originally thought were just the best things ever, seem to become useless over time.
The Mac application Quiver [1] introduced me to the idea of categories, which can contain one layer of sub-category, and either categories or sub-categories can contain articles, which contain text. A really simple tree.
This extremely simple structure is just enough to (A) contain everything I've thrown at it and (B) know where to look for something. And, you can make links from one article to another for when a cross-reference is good to have (but I do it very rarely).
I now use Obsidian [2] which is more modern, not Mac only, as well as being much simpler to use than Quiver, using simple markdown.