In college in mid 1980s all of my friends were communing online on the UMich mainframe. Back then I had already observed - "we have so much written correspondence from people a hundred years ago, laundry lists, love letters, etc. A hundred years from now, there won't be any surviving written artifacts of our own lives." The love letters I wrote 40 years ago have long since evaporated into the electronic ether.
Historians will draw a blank on our era.