Here’s one way I’ve been using links to blocks. In addition to all this content I have in Obsidian, I have something like 17 years’ of blog posts. I don’t want to copy all those posts into Obsidian, but many of them interact with and/or were built from notes that are in my vault.
So what I did was export my post titles, dates, and links from my blog, and make an Obsidian note for each year with bulleted lists of – linked – posts.
Then when I need to reference one, I can add a block link for its entry in the list, which takes me straight to a link for the post itself. Like this:
(I’m not just adding block references to everything on the list; I’m only adding them as needed.)