Really? Teams is the most sticky? Teams sucks. Excel and PowerPoint are the most sticky parts, and Teams just comes bundled with those.
Yes in some ways. Teams being bundled means that Slack and other messaging apps have to justify against a sunk-cost solution.
That makes teams very sticky.
Perhaps he has a very narrow definition of "the MS cloud productivity stack"
Windows? Office? Not cloud, in its roots. Active Directory? Entra? Azure? Not productivity. Github? Not MS. Copilot? Not sticky.
I agree that Teams sucks, but speaking to people who are locked into the Microsoft environment, they love it.