We, like many others, are relying on Skype for Business for messaging instead of Sametime. I know, there are customers, that have built an integration with S4B in Connections, similar to your Sametime integration offering. It would be so great, if there was more out-of-the-box integration with third party tools.
More than a year has passed and nothing has happened. Skype is EOL soon, but Teams will take its place. So that means that Teams integration will become even more important. Both ways. Integrate Teams in Connections for chat but also integrate Connections in Teams for File Sharing, Wikis and so on.