Like, never?
I've had it happen on a regular basis. I see someone and suddenly remember to tell them "oh, I did some work on that long ago, I'll share it with you" or you overhear a conversation about a topic you didn't know they were looking at?
I absolutely did have these interactions but simply not online.
Don't get me wrong, I think working remotely and home office are great. But something was undeniably lost, at least for me.
But the original proposition by the RTO managers is different. They posit that such spontaneous talks happen in a place different from any workers workstation, e.g. watercooler or kitchen etc. That is a two way conversation which to happen much check the following - both (or more) persons mush happen to go to the same place at the same time, and they both must have a topic to talk about in that particular moment. And those linkedin propagandists claim that a lot of such talks are supposedly highly technical about the project itself. Which is honestly never happens in my limited anecdotal experience.
For instance we had someone from a completely unrelated team bump into a project thread discussion our firewall rules, and coming up with the proposed changes he was working on and wanting to brainstorm something that could work beyond his team.
You'd need an incredible level of luck to bump into that precise discussion at a water cooler, and it would require a super broad call to get people to gather on that subject the "normal" way. But having most communication in Slack, indexed and accessible cross-team gives incredible opportunities for these kind of interactions that would be just impossible on the previous office culture.
The one thing I saw that actually works like that metaphorical watercooler is going to a bar and drinking together, or engaging in a similar activity that involves relaxing and unwinding. Of course, that's not something people feel comfortable about, plus it comes with its own set of issues and exclusions around time, family and alcohol, but that's the one type of situation I saw where people actually have those serendipitous productive interactions managers dream about.
