Well, i'm pro copyleft but in this case i have to disagree. This way Apple could develop D3DMetal much faster, and attrbution is given. If DXVK where GPL3 it might have happened years later if ever.
PS. I'm sure the people who pitched it and their managers are all sufficiently skilled at lying and lying to themselves to not put it or even think in those terms.
Monetarily good for the devs who ended up on Apple payroll, another nail in the coffin for competition and open computing at the same time.