Glad you asked. Underlined links are better for people with impaired vision. Each link also has to be a clear signpost to where it's going. A link labelled 'here', as in 'continue reading here', doesn't contain enough information for screen reader users who often navigate by jumping from link to link and need to understand the destination of each one in isolation. We've tried to design this site to be as accessible as possible for everyone, and if you are a screen reader user and find something that doesn't work for you, please let us know.