You want normal people to adopt the new OS faster? STOP CHANGING THE GUI! This is the main stumbling block for every new major version of Windows. It is the relearning of the user interface. This is a waste of time and money for both consumers and businesses.
Most consumers don't care about backend changes. And unless they are a hardcore gamer, they don't care about DirectX/Vulcan support either. As long as their X,Y, and Z programs still run, that's all you need.
The limited GUI changes in Mate version changes is one of the reason's I love Linux Mint Mate, I can upgrade and get VERY little GUI changes between each version.
I don't have to spend time and energy to relearn things I readily knew to do before. This goes for every user out there.