Yeah everyone is worried about the contents of their trivial lives being available for thousands of years like the tombs of the Pharaohs.
On one audio forum I post on they often ask which brand of blank CD gives the longest archive life for playback.
I mentioned that they only have to last for their lifetime. They were perplexed as to why I wouldn't want them to last say 200 years+.
They only have to last your lifetime because as soon as you die, Grandad's dusty old collection of 5000 obscure jazz LP needledrops will be heading for a skip! Same goes for most of your prized possessions.
No one wants old people's crap anymore, just the money, the house and the jewellery if there is any.
Some found that hard to comprehend and others enlightening.