I think that linking absolutely everything has the potential to show correspondences I’d otherwise have missed, especially as the database of writing increases. But I cannot say that it would necessarily help me except in rare events. It is interesting be to see how quickly the concept of backlinks has swept through the productivity and notetaking space, and I’ll follow the advancements in current and new apps, but I’m not ready to be a guinea pig for new, evolving apps with the feature.
I think that I’d generally get more out of manually searching with DevonThink, say, and using its boolean and fuzzy searching to show me scored results of files with related material I could peruse, while letting me use a more comfortable app environment for my notes and long-form writing.
When I take notes it’s in outline form, and at this point I automatically internally compose and sort things in my mind in outline and bullet-list form and I’m mostly in control of the text and resources. (Well, less so for the pdfs and epubs and webarchives - but Zettls and Roams and Obsidians can’t do anything with those files anyway.) My ideal, unrealized writing environment would be a Dynalist/Workflowy/OmniOutliner-style outliner for note-taking which, with a click, would blossom a Scrivener/Ulysses-style left column series of folders/sheets with a main writing area into which I could fill or expand the outline text. In the mean time scratch out bulleted quick notes in Drafts, I outline like a madman in OmniOutliner, and I use outlines side-by-side with Ulysses text windows.