Thanks for the details @obbiie!
I’m still in the exploration phase on how to use a Zettlekasten, but what you describe is exactly how I’m currently thinking about using it. I’d prefer to keep it all in DT3 so I will see if Kourosh’s ideas help me achieve that, if not I like the idea of indexing the files that I can then use in Obsidian but still search in DT3.
I do keep all in stuff DT3, that is my main workhorse so to say. Obsidian provides a very nice graph feature which is beautiful add-on to all the features DT3 is giving. You can read more on this e.g. here on the forum or Curtis’s blogpost on this.