The personalized, colorful web pages became streamlined, conforming to modern design standards and sacrificing individuality for uniformity.
There are some pretty big advantages to ‘modern design standards.’ For one, they make the Internet a less hostile place to users with accessibility needs. I don’t have problems viewing clashing colors, flying gifs, jumbled pages with no sanity, etc, but a hell of a lot of people with various disabilities sure do. I don’t want to even think about how screen readers try to deal with pages like that. Web1.0 offered absolutely nothing for those users who needed accessibility.