I strongly agree with the title but the prescribed details are not to my taste. Pick a channel grouping that makes sense (by-team/by-project/by-manager) and Just Start Typing. Busy channels are alive and will create their own culture organically. Freely mix in work talk with pictures of cool stuff you found while walking the dog. "threads" makes this extremely manageable.
Strongly agree. This is what threads in the project channel are for.
Creating excessive channels for everything gets out of hand quickly. It’s a habit you see from people who worked at small companies before threads were available on discussion platforms.