I do not understand this wiki word linking thing. I mean if I making a guide for others its perfect, but for me, I do not see a use case for it. I can simply search the notes for what I am looking for me instead of browsing it like a website.
It's a matter of how one uses their notes, and the content of their notes.
Notes/knowledgebase can range from a disconnected pile of notes (Google Keep without labels) on one side, or a tightly organized hierarchical structure (rigid outline) on the other... with a mix of both in between.
Physical hierarchal structure, simple searches, (hash)tags, and wiki-links are ways to access the information. Each has their own set of advantages and deficiencies that make any one of them insufficient as the only way to interact with the data.
Some like tagging notes so that searching for a particular tag can display notes that might not appear in the same hierarchy of information. That's helpful if one knows in advance what they're going to want to refer to in the future.
But what typically happens; a person will create a bunch of notes and tag them, for example: #recipe. But as their notes database grows, they decide that they want to additionally tag notes with the
type of recipe. So they have to go back into the individual notes that are tagged with #recipe and add the new tag, #dessert, #entree, #maindish, etc.
The person also needs to know what tags exist and what they represent. That requires maintaining a "tag" index/glossary that lists the tags and an explanation for when each tag should be used.
A hierarchal structure, like an outline, helps organize information into clear categories and order... the higher up the outline structure a term appears, the more general it is. The lower in the outline tree, the more specific.
The greatest limitation of the structure is that each "atomic" element/note can only appear in one place in the outline tree... even if it is relevant in other areas of the outline.
Searching, when simple, works fine for most situations. But issues arise when more complex searches are needed. That's when support for something like RegEx is needed. That isn't something that most notes/knowledge systems support.
Even with simple searches, searching can be incomplete. One needs to know what word(s) appear in a note that they're interested in.
All of these approaches to accessing data requires some amount of premeditation when adding a new piece of information to the knowledgebase.
I have a personal knowledgebase that spans 40 years. This information spans all topics.... personal, work, technical, ministry, projects, etc. It started out as a strict hierarchical structure, but as data was added, the hierarchy no longer made sense and connections between seemingly disconnected pieces of information grew.
I make use of the hierarchical structure that most notes apps support, in addition to tags/labels, and now hyperlinks.
With hyperlinks, the connections aren't just 1 level deep as they are with searches and tags. These links can form chains that allow for greater insights/access.
Regarding wiki-linkin in Obsidian:
The wiki-linking in Obsidian is a visual way to display those connections (based on inline words/phrases, not a consciously defined tag)... it's not simply a list of results that match a search criteria but a visual map that shows the relationships between those notes. It displays the link chain so the relationship between two pieces of information can be displayed even when they are not directly connected to each other.