This article http://blogs.bl.uk/digitisedmanuscripts/2017/07/the-mystery-of-sappho.html http://blogs.bl.uk/digitisedmanuscripts/2017/07/the-mystery-... (from th

This article http://blogs.bl.uk/digitisedmanuscripts/2017/07/the-mystery-of-sappho.html http://blogs.bl.uk/digitisedmanuscripts/2017/07/the-mystery-... (from the same source) suggest her works were lost because the language simple wasn't understood in medieval times. This sounds more plausible than deliberate destruction.