I find the idea of owning a personal knowledge graph incredibly intriguing, but I've had trouble getting started. To be frank, I'm not quite sure what to include. A lot of the information that I might feel like I would want to save is also readily available via Google and can be retrieved faster by Googling than by diving into my Obsidian notes. I'm focusing primarily on personal use-cases, so nothing for business or freelancing. What do you use Obsidian for? And how much do you use it? Tens of notes per month... Or hundreds? Or even thousands?
I mainly use it to record my notes and processes on photography, post processing photos and bread making. It also gets used for Linux, Ubuntu and vim tricks and tips that I find useful.
Whilst you can search Google for information, I would rather search Google once, find a good link then make my own notes that I can refer back to quicker than using Google again. I can also combine many Google links into one document as each link may have better points than the other.
Overall it's to make my life more efficient by not having to remember everything and also "writing is learning".