That's why, I believe, Slack had filed an antitrust claim against Microsoft [1] claiming that Teams has an unfair advantage by being bundled in the O365 package

That's why, I believe, Slack had filed an antitrust claim against Microsoft [1] claiming that Teams has an unfair advantage by being bundled in the O365 package which make the chance to pick Slack over Teams for companies already purchased O365 near to zero. The claim is two years old now and I haven't heard any news regarding the matter and whether Slack proceeded to the end like Epic Vs. Apple or not [1] https://www.bbc.com/news/technology-53503710 https://www.bbc.com/news/technology-53503710