Another problem is that when somebody comes up with a unique block, it's usually bundled into a collection. Like the Event Block that I love and as far as I know, is totally unique (correct me if I'm wrong) - but you can't just get IT, you have to get the whole WP Munich Blocks set - https://wordpress.org/plugins/wp-munich-blocks/

Which has a bunch of redundant blocks and all of 500 installs, and while they've been pretty good at maintaining it, it's anyone's guess when it'll be abandoned, forcing users to search for a replacement and hope and pray for some consistency between the old and new block - which will most likely be part of yet another, mostly redundant collection.