This weekend Wimpy did a live-stream. In this stream he announced some changes that will be coming to Ubuntu MATE 21.04. I encourage you to take the time to watch the video as it goes into details about the why and how of the upcoming changes.
This is a quick summary for Ubuntu MATE users:
Global Application Menu and the HUD will be removed from the default install of Ubuntu MATE 21.04. This results in the following Layouts also being removed:
These all rely on the Global Application Menu and the HUD and with those being removed, these layouts will no longer be supported.
While we do realize that some users will miss these features, the problem is that they are "no longer up to snuff". They are also the source of a large number of errors and bug reports.
Cupertino users to switch to Pantheon
Contemporary users to switch to Familiar
There is another layout change to talk about. Redmond is switching from the Advanced MATE Menu to the Brisk menu.
There also may be a new layout in the works, so please stay tuned. Thanks for understanding as we move forward in improving Ubuntu MATE.