For the record, Nvidia cards also auto-overclock past their boost rate, something called GPU Boost 3.0. So, I don't understand why people have a problem with AMD's Rage Mode.
As for the original question, the 6800XT outperforms the 3080, that's why people would buy it. If all you care about is Ray Tracing, then that's a completely different story.
But, seeing as you already have a 3090, why are you asking the question? Are you just trolling? You are posting a question, then answering it, making false claims about drivers, and stating a preference for a card that would be inferior to both the 3080 and the 6800XT.