Hacker News remembers. It has become one of the best databases of post-2006 tech history.
I attempted to recreate the feeling of "being there" for noteworthy discussions by animating the comments as they unfold:
Dropbox introduced
https://hn.unlurker.com/replay?item=8863
Nobody cares about Chrome?
https://hn.unlurker.com/replay?item=292634
Early Bitcoin (this one is a bit of a joke. I hope you bought some, jdoliner)
https://hn.unlurker.com/replay?item=599852
Go Language Announced
https://hn.unlurker.com/replay?item=934142
Stripe Introduced
https://hn.unlurker.com/replay?item=3053883
More in drop-down on the site or enter any other item ID. Better on desktop.