I sort of want a Hacker News/Reddit style tool for work with upvotes and nested threads. Slack is good for realtime discussions but it's really hard to find a

I sort of want a Hacker News/Reddit style tool for work with upvotes and nested threads. Slack is good for realtime discussions but it's really hard to find a conversation from last week or a popular discussion that I should read. For any topic that doesn't have to be discussed realtime, I just want a front page sorted Hacker News style based on upvotes and recency. This will also make it easier to find the context of a decision years down the road.