Just to mention this once again: These system crashes still occur, and way too
frequently to consider the amdgpu driver stable enough for professional use.
Sample dmesg output from today:

Feb 24 18:26:55 [drm:amdgpu_job_timedout [amdgpu]] *ERROR* ring gfx timeout,
last signaled seq=5430589, last emitted seq=5430591
Feb 24 18:26:55 [drm] IP block:gmc_v8_0 is hung!
Feb 24 18:26:55 [drm] IP block:gfx_v8_0 is hung!
Feb 24 18:27:02 [drm:amdgpu_job_timedout [amdgpu]] *ERROR* ring sdma0 timeout,
last signaled seq=185928, last emitted seq=185930
Feb 24 18:27:02 [drm] IP block:gmc_v8_0 is hung!
Feb 24 18:27:02 [drm] IP block:gfx_v8_0 is hung!
Feb 24 18:27:05 [drm:amdgpu_dm_atomic_check [amdgpu]] *ERROR* [CRTC:43:crtc-0]
hw_done or flip_done timed out