If you are interested in sharing book recommendations with other, or just manage your books, then bookwyrm is great for that! The .world team also has a bookwyrm instance up and running at bookwyrm.world with a community here on lemmy as well at !bookwyrm@lemmy.world. Read Ruuds original post about it here: https://lemmy.world/post/5904792
If you want to join another bookwyrm instance, then head over to joinbookwyrm.com.
Anyway, it’s a great place to find books, share books, and find people with similar interests in books! If there is anything that you feel needs to be improved or changed on the bookwyrm.world instance, then contact me!
EDIT - Mastodon account for the instance: @bookwyrmworld@mastodon.world
Well yeah, what did you expect? The fediverse is brand new while goodreads is at least 15 years old (without looking it up). I have people from high school on my friends list there and I’m in my late 30s.
It goes without saying that they have more users and therefore more reviews. That stuff doesn’t happen overnight.