Comment by thereddaikon

Older games used precompiled shaders. These are inaccessible to the game devs and usually handled by the hardware makers, so the platform OEM for consoles and the video card OEM on PCs. Game devs have begged for the ability to write their own shaders for years and finally got it with DX11 and Vulkan. And that's when things went to hell. Instead of the shaders being written and compiled for the specific hardware, they now have to be compiled for your GPU at run time. It's a messy and imperfect process. EA, Ubisoft or anyone else is never going to have the same level of understanding of a GPU that Nvidia or AMD will have. Often the stuttering is due to the shaders having to be recompiled in game, something that never happened before.