So, general question about Zettels- do you maintain more than one for different aspects? Or just break up stuff within based on tags and folders?
I don't see myself as having zettels, though my system is heavily influenced, as are all the newly available programs.
Ideally, I would have one only - and may do that ultimately.
Everything is dependent on the technology.
I have sets of folders for my writing, but all within the one Obsidian vault. Only separated to make them easier to access with other programs.
I may have a separate vault for files I need to keep secure. Or don't want to back up online &etc. I haven't worked this out yet. I'd prefer to have them together, but security matters more. Depends on what I decide is the best solution.
If I'd gone with Roam, my writing would be outside as would chunks of the other notes and documents.