It solved IRC? I mean, "Slack" is now other products like Teams or Matrix too. Apparently running your own chat servers and supporting only plain-text chat out

It solved IRC? I mean, "Slack" is now other products like Teams or Matrix too. Apparently running your own chat servers and supporting only plain-text chat out of the box was a problem for the common person. Although to me holding your chats hostage is unique to Slack afaik and I don't think it has e2e which is a major issue personally but not so much in a corporate setting.