Message center notification MC392289 highlights the need to keep the .NET Framework and the Edge WebView2 components updated to make sure that the Teams meeting add-in works with “degradation.” No further information is offered as to why Microsoft needs to sound this warning several years after introducing the Teams meeting add-in.
Maybe when the One Outlook (Monarch) transition is complete. It's possible that an OCX component might take the place of the add-in. I wouldn't be too down on add-ins though. They do a job and work well, once you understand them.
