Is this the worst ad in the history of advertising? HUGE publicity for Microsoft, with a schoolboy level of condescending, passive aggressive nonsense. Not sure what they were thinking with this one, especially with an opening line doing nothing but praising their competitor.
Yeah they could have saved the cash on the ad and not said anything. Nothing says like your competitor isn't even in the same league than ignoring said competitor. Slack, though, will probably benefit from the fact that teams is a Microsoft product and non-MS shops aren't likely to being MS products into their stack but in companies with an MS stack like the one I work for I could see this being adopted.
Slack seem to act like MS doesn't know anything about this market - they bought Yammer several years back. I think they know something about chat/groups/teams.