No, it's true. There can be defects in the graphics driver that make certain, specific functions in GLSL or WGSL either completely broken or woefully inefficient.
It can be very dependent on hardware generation, too. One of my past projects was a very simple, photosphere-based learning environment. Photosphere rendering is incredibly simple. But on Intel processors with Iris Xe integrated GPUs used by one particular year of iMacs (I don't remember which, it only impacted 2 users and it was several years ago), I couldn't use the standard cube sampler because it was just broken. I had to split my photospheres into 6 cube faces and render 6 quads separately to be able to use the not-broken 2d sampler. The issue didn't appear on any other generation of Iris Xe on macOS and it didn't appear on any generation of Iris Xe on any other OS. It was very specifically the combination of macOS and that generation of GPU.
It can be very dependent on hardware generation, too. One of my past projects was a very simple, photosphere-based learning environment. Photosphere rendering is incredibly simple. But on Intel processors with Iris Xe integrated GPUs used by one particular year of iMacs (I don't remember which, it only impacted 2 users and it was several years ago), I couldn't use the standard cube sampler because it was just broken. I had to split my photospheres into 6 cube faces and render 6 quads separately to be able to use the not-broken 2d sampler. The issue didn't appear on any other generation of Iris Xe on macOS and it didn't appear on any generation of Iris Xe on any other OS. It was very specifically the combination of macOS and that generation of GPU.