overwatch plays flawlessly on macOS right now, Game Porting Toolkit 2 is DirectX on Metal done by a $1T company.
all that said, they view this as enabling the consumer by supporting their hardware better, they have an antagonist, mafia-like relationship with game developers.
Overwatch is a low bar - it's one of the games you can run with the upstream WineD3D OpenGL drivers from the early 2010s.