@andrew My wife uses it to write her novels and store research regarding them, but I have to hard plug org-roam+org-roam-ui in emacs, especially if you're a researcher!
I can send you details if you're interested, but after switching to emacs (along with zotero) I've been so much more productive in ingesting research papers into my notes database, referencing and cross-linking my notes, coming up with new ideas, and just writing papers in general.
Obsidian gets some of that functionality, but it's not as well integrated with other services as emacs packages can be, IMO, and I don't think it's FLOSS, if that matters to you.