The Teams classic client has been replaced by the Teams 2.1 client. Microsoft will block access to the Teams classic client for people running the app on unsupported platforms in October 2024. The final block swings into place for everyone on July 1 2025. The migration to the new client appears to be going well, so I’m not sure if many will miss the old client.
https://office365itpros.com/2024/04/29/teams-classic-client-slips-away/
