Do you use a Slack type chat app to communicate with colleagues? What's the worst part of using it?
The only organizational memory that's written down permanently is a wiki that we're all expected to keep updated with anything that needs to be known by others, and our source code repositories.
I think the main problem is people think they can just search for context when they forget it... but then you eventually forget what you need to remember :)
I find wikis to be pretty useful.