There's a good amount of different compatibility layers that you can use. There are a few vulkan implementations, there is Angle, and Webgl is still working...

There's a good amount of different compatibility layers that you can use. There are a few vulkan implementations, there is Angle, and Webgl is still working... Depending on what you are doing you can still do a lot with OpenGL, you don't have to rely on the implementation in Nvidia drivers or whatever. I think most people using it are just really comfortable with it's shader language.