I agree with the statement that this is no different to an archive itself choosing to change web hosts, or choosing to change its site design, or choosing to change its site design to include elements that some authors might find offensive (eg. the archive affiliating with a political site or hosting offensive ads). If an effort is made to notify people in advance and afterwards they can still take down their stories, then I'm glad as a reader that the material will still be available rather than disappear from the internet.