I document technical things on my blog and hardly anyone reads it.
But later on when I need that thing again, I just go there and I have the perfect documentation available for the topic (it's perfect since I wrote it hahaha).
I searched high and low and found Obsidian. Now the idea of using OneNote sends shivers down my spine.
It happened to me a few times that I forgot I wrote something down, only to find it via google search.
There starts to be some traffic, I am happy to assume that any person visits my blog for a fix will probably save a good amount of debugging time.
I can also add permalinks to any of the posts from anywhere, and share them in public documentation or bug reports and such, a handy feature.