With the end of Yahoo! Messages, Yahoo! succeeded in destroying the most amount of history in the shortest amount of time, certainly on purpose, in known memory.
http://ianmilligan.ca/2013/04/03/yahoo-sucks-historians-wake-up/

Dream on. The industry doesn’t do hundred-year periods, and that’s why digital archives are no more stable than, say, the finance industry.
http://www.wired.com/beyond_the_beyond/2013/04/dead-media-beat-speculating-about-migration-hell/ "Unless we reach a stage where archival technology becomes as stable as paper and printing had been for decades, centuries even, then we cannot, unquestioning, keep all the data we digitally collect."

Total data is growing faster than total storage. So we're not just creating data faster than ever, we're also forgetting it faster than ever.

All those moments will be lost in time, like tears in rain.