It's about time. I don't know exactly what Prince means by "gateways vs gatekeepers" in this context as Slack is itself a pretty closed system, isn't it? It's not using open protocols or interpretable with competing chat systems as far as I know. However I do find their allegations that Microsoft forces a subpar uninstallable copycat product to be accurate and credible. Teams is a bottom tier application and they are so aggressive about forcing it on users, it's a little silly.