One issue with OpenGL is it was originally designed in the 90s when modern GPUs didn't exist. Whilst the API has evolved since then there was a reticence to chu

One issue with OpenGL is it was originally designed in the 90s when modern GPUs didn't exist. Whilst the API has evolved since then there was a reticence to chunk it all away and start again with a clean slate, or at least have a radical resdesign (something DirectX didn't shy away from). Vulkan is built based on modern GPU architecture as well as being lower level then OpenGL. This makes it easier to get the best out of the hardware.