Is that an Apple-specific Covid response? Teams have been more, not less, siloed at the job I've had since Covid started. People bold enough to complain in big mega-channels hasn't happened (similar to how few people would complain in all hands the same way they'd complain at lunch).
Prior to Slack, intra-company communications at Apple have been historically limited. Just being able to ping anyone at an instant is a cultural sea change.
