lots of things: - Implementing OpenGL drivers is very complicated, this leads to huge drivers full of bugs and performance issues. Just look at something like

lots of things: - Implementing OpenGL drivers is very complicated, this leads to huge drivers full of bugs and performance issues. Just look at something like this: https://dolphin-emu.org/blog/2013/09/26/dolphin-emulator-and-opengl-drivers-hall-fameshame/ https://dolphin-emu.org/blog/2013/09/26/dolphin-emulator-and... - OpenGL's state machine logic is outdated and horrible to debug. We need something more modern. Basically its carrying cruft from the last ~20 years. - It can be very slow compared to Vulkan/Metal/DX 12. - It doesnt allow modern features like GPGPU. this would allow is to truely use the GPU for computing stuff (e.g. AI, novel shaders, new graphics pipelines etc.)