For what it's worth and graphics on Linux are working great with amdgpu. Their efforts to develop and support open source mainline graphics has really finally paid off. Support is usually mainlined before hardware release now. I don't think "just works" integrated graphics are an issue for either company (Intel/AMD) in general on the Linux front.

That said the amdgpu driver is still relatively new and major changes and improvements are still ongoing but overall it's definitely production stable and for dedicated gpus performance is generally very good.

Not trying to sound like a fanboy it's just nice to see someone else push as hard for open source mainlined graphics as Intel has for all these years.