The goal is to improve on RepArchive, but that doesn't mean RepArchive will be obsolete.
RepArchive is still going to be the best place for news articles.
Additionally, the approach to guides is different. Guides on RepArchive focus on the why and how and explain the background. On Taobot, the focus is to give you a clear and concise answer, without spending much time getting there.
In that sense, RepArchive still serves a purpose, especially for a more hardcore audience, that are deeper into the topic and care about the background and how things work.