I was only willing to try it out because I had heard it mentioned [0] on CGP Grey's cohosted podcast, Cortex, in the episode they did on productivity software subcultures. Specifically I think CGP Grey was saying he didn't "get" Obsidian but had observed a fanatic fanbase around it of people who thought it was god's gift to note-taking because it represented the links between knowledge in a unique way. Apparently I'm one of those people because I went from installing it for the first time to writing all my new thoughts down in it in the space of 3 days.
I suspect the real reason I liked Obsidian right away is that long ago I used Microsoft Onenote as a freeform notetaking app to just spew unrelated thoughts into that I could organize later. Onenote's interface was good, but there was no way to port those notes in an exportable format to a new computer when the one with a Onenote license died.
[0]https://www.reddit.com/r/CGPGrey/comments/ihkqjp/cortex_105_...