That's not really a fair comparison. Git changes but the version you have and are looking at is fixed. With slack the conversation changes and you can't let the

That's not really a fair comparison. Git changes but the version you have and are looking at is fixed. With slack the conversation changes and you can't let the user respond until they're up-to-date because if they did people would be on HN ripping Slack for causing confusion. Not only that but the messages can literally change from one moment to the next. What happens when a user deletes a message? The equivalent with git would be having each directory be a submodule and someone is rewriting the history out from under you every few seconds. For technical people it’s easy to assume we understand the problem especially when we see what looks like a questionable design choice but when we do this to applications we don’t have experience with it only hurts us collectively.