I found the following from the Guardian on Geneanet, a French genealogy site

The article is:
Websites 'must be saved for history'
The British Library's head says that deleting websites will make job of historians harder
David Smith, technology correspondent
The Observer, Sunday 25 January 2009
Article history

I am unable to print the article here for some reason, maybe it is too long, but it refers to information being available on a website, then disappearing for ever. It is worth noting.

www.guardian.co.uk/technology/2009/jan/25/preserving-digital-archive