Microsoft has posted a new support page that outlines the changes from the old "classic" Teams client to the more recent "Teams 2.0" version including some features that are going away.
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Microsoft has revealed that the classic Teams desktop app will no longer be updated or supported after July 1, 2024 and that it will stop working altogether in the near future as well.
Microsoft has revealed that the classic Teams app, which was due to be retired after March 31, 2024, in favor of the new Teams app, will still be available for users until at least July 1, 2024.
Microsoft has posted word on its private Microsoft 365 admin center that the classic Teams app for Windows and Mac will automatically update to the new Teams app after March 31, 2024
Microsoft is rolling out a revamp of its Channels features generally available for both classic and new Teams apps. It includes a refreshed user interface along with other features.