Yes, I found that strange. After reading the first few words ("Congratulations on today’s announcements.") my first thought was, "What announcements?" .. then a

Yes, I found that strange. After reading the first few words ("Congratulations on today’s announcements.") my first thought was, "What announcements?" .. then after reading for 30 more seconds the second reaction was, "Slack is scared and not happy about this", which is something that wouldn't have crossed my mind had they not written this.