I feel you haven't been reading what I've been saying if you are claiming a "single chat log". The whole point of what I'm saying is that there are various forms of communication that can be used in a project and the one I'm part of literally couldn't function with an async-only forum type setup. Chat is for temporary, transient communication. Forums (and by extension Lemmy/Reddit) are for longer form async discussions with defined topics. Both are valid as has been the case all the way back into the days of having both a mailing list and IRC channel for a project.