My experience has been positive so far on a laptop with RDNA1 graphics(5500m). There is no true graphics switching. The iGPU is responsible for drawing things on the screen. What it does is offload heavy rendering tasks to the dGPU and then draws the rendered output provided to it by the dGPU. This leads to a small performance penalty but gives graphics switching on laptops without dedicated hardware to enable it.

So all in all, hybrid graphics works well in laptops with an AMD dGPU. I would argue the experience is better than the one in windows.