It's absolutely absurd that in 2023, the largest tech company in the world cannot find a way to not show me recommendations for books it knows I have already read.
I also get irrationally enraged anytime Goodreads gets confused about multiple formats of the same book. Oh, I have read the paperback version of The Way of Kings, but surely I need to be recommended the Kindle and leatherbound editions, too, as those are completely different books!