No, it is overly complex for modern hardware (unless you use shader objects). Vulkan forces you to statically specify a ton of state that's actually dynamic on modern GPUs. You could cut things down a ton with a new API. Ofc you'd have to require a certain level of hardware support, but imo that will become natural going forward.

Actually, it would be kinda neat to see an API that's fully designed assuming a coherent, cached, shared memory space between device and host. Metal I guess is closest.