As a long term AMD GPU user, i can say that in the days of the Catalyst driver (HD 5, 6 and 7 Series GPUs), it was buggy as hell and was crashing, but not to a point where it is unusable, those were minor stuff that were fixable if you had 5 mints to spare.
Now coming forward to the new Adrenaline 2020 drivers, i never had any major issues with them. I even resort to using the streaming software AMD provides in their drivers since it gives me a much better streaming performance than OBS does with my current config. On top of that while streaming i don't lose performance at all (maybe 1 or 2% while in heavy situations) since my R5 3600 can handle it.
For example, here is a link to a 4 hour stream i did yesterday: