I think there are several perspectives on this: - For some, Twitter is a chat and chats usually are meant to be short-term with an expiration date. - Twitter

I think there are several perspectives on this: - For some, Twitter is a chat and chats usually are meant to be short-term with an expiration date. - Twitter is a store front, because it is used to promote services or products and only the stuff that got posted recently is relevant. Furthermore, some people auto-delete their older Tweets with tools for various reasons. I think it makes sense to archive Tweets of public figures, especially politicans to hold them accountable in a way or just for historic purposes. This can, should and is done by third party services. But this isn't the only way to see it.