[ntakasaki]

Also, Vulkan is going to support extensions like OpenGL did which fragmented the hell out of OpenGL.

Nvidia is already beginning the lock in and fragmentation process by making Vulkan extensions.

https://developer.nvidia.com/engaging-voyage-vulkan

>NVIDIA will therefore provide a few Vulkan extensions from day zero, so that you as developer can enjoy less obstacles on your path to Vulkan. We will support consuming GLSL shader strings directly next to Vulkan's mandatory SPIR-V input

[gnarbarian]

Nefarious intent aside. This will make it much easier to port large projects over piece by piece so its not an all or nothing proposal that requires a complete rewrite from day 1.