If Slack is marketing their product for businesses and as an office product ("we're trying to kill email"), then it's hardly unrelated. If companies are looking

If Slack is marketing their product for businesses and as an office product ("we're trying to kill email"), then it's hardly unrelated. If companies are looking for a solution that streamlines the functionality of SharePoint, Teleconferencing, and collaboration, it seems directly within Microsoft's wheelhouse to include Teams as a part of M365.