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I once worked at a job where the only effective form of communication was grapevine gossip.

By effective, I mean it was the only way information was shared regularly. And it was efficient, too - we communicated in the form of short, to the point DMs that pinged around the company whenever anyone got any kind of information. No fluff, no delays, no corporate speak.

A terrible system, but it it persisted because it was the only way to share information well.

It did, however, also lead to a rumor that our CEO was dying of cancer.

So no, not a perfect system.
A nice (or nicer) workplace has clear lines of communication.

In other words: We know how to effectively communicate with each other without getting mired in drama or notification overload.

Setting these communication standards is important for managers and humans-in-charge, but it is ultimately everyone’s responsibility to create and maintain these phone lines.