+1 for logseq... it literally saved my life when I changed jobs, nothing else came close.
However, the original markdown version has really slowed down development whilst the newer db version is slowly catching up, so, I'd rcommend the MD version for now, but people might want to hold for a little while...
I used to put all my setup & config notes into tiddlywiki, and to some point I still update them, but it's become difficult for others to update and maintain when I share them as you need a browser addin to be able to save updates properly.
The formatting is similar to markdown, but just a little different to make copying the original source that way too... but... I'd still consider it, esp. once you've really played with it and found all the things it's capable of.