It enrages me when I remember about all those websites that have mass-removed old content in order to "rank better" because the owners of some search engine that may not see the middle of the century said that that content was "thin" and not "fresh".

I think that websites and news outlets of any kind should be legally forced to preserve old content unless there are strong reasons not to do so (ex. web pages that contain viruses). Any removal of content in bulk should be made only with public oversight and input for historians, archivists etc.