I fail to see how this is different from a general off-topic chat channel which you're not expected to follow (but can peek at on downtime or while waiting for Claude Code).
While that doesn't scale for large companies, for 2-10 (mentioned in the article) it's better than 2-10 such channels you need to keep track of.
In practice 2-10 individual channels with 1-3 posts per week has less overhead than one off-topic channel with 30 posts because there's less mystery meat. It reduces the "am I missing something important?" feeling.
We do also have an off-topic channel but on our team the individual rambling channels get more posts. Maybe because it's less likely to derail an existing conversation and allows more continuity with each person's thoughts.
It depends, #general isn’t necessarily declared to be only used for off-topic content. It can serve as an official channel that everyone is obligated to read.
While that doesn't scale for large companies, for 2-10 (mentioned in the article) it's better than 2-10 such channels you need to keep track of.