@resmo
As a admin of such a system, while i hate its propriatary nature, I must say there is value to it.
But only if people can properly define how to use it and some self controlling mechanism prevents it from getting outdated.
Ours has some inline comment system. Same i see here.
Pointing someone on a spot and use it as a temporary short async communication is valuable.
But I have seen long running discussions there, thats what indeed other channels are for.