I'm not sure what you mean by dev/depl log, but there's architectural decision records in there. There's spike docs, which look into how long something would take - some have useful decision research, but they're generally not scrubbed out when done. Old stuff is swept into some "Archives" folder.

Search is the real value though. I never remember where a certain doc is stored. But if I can remember who wrote it or some snippet from it, I can find it. They link to each other well. Another pointer is from Slack; maybe it needs this kind of combo to work well together?