I don't know if you can call competition when the other guy is teleported directly at the finish line. This issue affects open communication applications too not only Slack. What would be ironic is if EU forces all of them to use open standards so I could integrate my open source app into Office too
I completely agree with you, but I wanted to say they shouldn't have been so cocky back in 2016, just to go from "Slack is here to stay" to "mommy I am losing market share".