I take a lot of literature notes in Obsidian, and some of them (if not all) contain some quotes. I tend not to separate these quotes from their lit. note, although that can happen sometimes if the quote is so “quote-worthy” (I have a separate ‘#quotable’ tag for that; but most of the time, I just quote because something is better put than I could paraphrase).
I do use [[Name]] page for “primary authors” in my field (history of philosophy – basically, anyone “dead” is a “primary author”. I know it sounds silly).
I like it because on the [[Name]] page I can note down a few details about the person, and then have an embedded query with the [[Name]], which will list all the quotes/notes about that author. (Basically, they are MOC’s, except they are about people and are auto-generated, sort of.) On the same page, I also have an embedded query for #Name, which gives me a list of all the secondary literature on the same person (so basically, I use [[xxx]] for authors and #xxx for topics). This has worked well for me; for every author, I get an automatically updating “mini-encycopedia” page that requires basically no manual maintenance.
Anyway, all this may only be useful in the field I am in. But I think “author pages” could be useful for anyone who collects information about people/authors.
I don’t currently have #tag pages except for a couple of them that are in my central research. But that may be an interesting idea too.
One general advice – always list the source. There’s nothing more annoying than having to find a quote in a book (even digitally) and not knowing where to look. So I mark all my lit notes with the citekey for that specific article/book, and similarly for standalone quotes – citekey+page number.