If you’re building a midlife crisis gaming PC the 4090 is the only good choice right now. 4K gaming with all the bells and whistles turned on is a reality with that GPU.
My point is that Nvidia has the absolute highest end, but it's ridiculous to suggest that anyone with a budget less than the GDP of Botswana should consider the 4090 as an option at all. For actually reasonable offers, AMD delivers the most performance per dollar most of the time.