That's effectively what I do as well, but we don't have a corporate Slack account.
Teams is great for internal communications on long-running projects. It's well suited to that and I wouldn't substitute Slack. When used well, it cuts down on a ton of internal emails and status updates.
I don't really blame IT for locking down Teams. It makes a lot of sense for all the reasons you mention and many more. It's just that by locking it down they prevent Teams from really being a challenger to Slack.
It's not that Teams can't be configured to be just as useful as Slack, but enterprise IT best practices pretty much guarantees that it never will be.
Teams is great for internal communications on long-running projects. It's well suited to that and I wouldn't substitute Slack. When used well, it cuts down on a ton of internal emails and status updates.
I don't really blame IT for locking down Teams. It makes a lot of sense for all the reasons you mention and many more. It's just that by locking it down they prevent Teams from really being a challenger to Slack.
It's not that Teams can't be configured to be just as useful as Slack, but enterprise IT best practices pretty much guarantees that it never will be.