> Why not have 2000 hand curated directories instead?
It depends on what you're trying to achieve. If you want to have a personal feed of stories from interesting people, 50 is probably enough to give you some interesting daily reading. But if you want to build a "small web" search lens, you absolutely need to cover. For example, Kagi is billing a "small web" search filter, but it excludes a lot of the small web because they only allow actively-maintained blogs and only a subset of them.
It depends on what you're trying to achieve. If you want to have a personal feed of stories from interesting people, 50 is probably enough to give you some interesting daily reading. But if you want to build a "small web" search lens, you absolutely need to cover. For example, Kagi is billing a "small web" search filter, but it excludes a lot of the small web because they only allow actively-maintained blogs and only a subset of them.