It's much easier to keep digital records these days. Pics and video and store them away for eternity.
Hmm...my logbooks will be readable(if they are not physically destroyed) for many, many years to come. I started doing computer based backups 20 odd years ago, for just that eventuality.
Those backups are now unreadable due me changing(over the years) computers, operating systems and software. Will the filetypes of logbook software be readable in years to come, or will you be able to connect the device that you used to a future computer?
Paper is the only storage medium that can be read hundreds of years after it was written. Think 5.25 floppies, 3.5 floppies(some won't even know what they are) and DVDs(on their way out).