Teams doesn't have to be good to succeed. It just has to exist. It's not even very important how good it is. Given it exists, IT will make everyone use it on Microsoft's behalf regardless of how bad it is.
Or another way to look at it is that the real customers for Teams are IT departments. It makes their lives easier because they don't have to do anything and it meets all the compliance requirements they are supposed to enforce.
Which in turn reflects that the real customers of IT are regulators and auditors. Nobody with decision making power actually cares whether any of the software in use in enterprises works well or not.
Or another way to look at it is that the real customers for Teams are IT departments. It makes their lives easier because they don't have to do anything and it meets all the compliance requirements they are supposed to enforce.
Which in turn reflects that the real customers of IT are regulators and auditors. Nobody with decision making power actually cares whether any of the software in use in enterprises works well or not.