Ask HN: How do you communicate at work, and whats the worst thing about it?

We use a self-hosted Rocket.Chat instance with a maximum retention period of a couple of weeks, to encourage people against using it to store anything long-term. Almost all our internal emails are automatically wiped after a few months, for similar reasons.

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.

Well, IMO its certainly better than emails.

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.