What you cannot use is applications that use OpenGL or Vulkan acceleration. GBM is used for sharing buffers across APIs handled by GPU. If your Wayland clients use just shm to communicate with compositor, it will work.
What you cannot use is applications that use OpenGL or Vulkan acceleration. GBM is used for sharing buffers across APIs handled by GPU. If your Wayland clients use just shm to communicate with compositor, it will work.