Water cooler conversations weren't killed by binge watching, but that did remove a significant portion of possible conversations. Common things remaining are current events mostly (top of my head): gossip, politics, news, sports, work.

Other stuff can still happen, eg. a colleague enthusiastically sharing something they learned or a discovery they made ("did you know how to properly use a paperclip?!").

But yeah, there's significantly less "things you probably also saw since yesterday and have an opinion about" stuff.