But that wasn't the point. You said the problem with hedt was the cost, when the costs on the mainstream have gone completely bonkers the last few gens. Have you checked mobo prices? Both x570 and x670 are through the roof.
And what makes you think you need X570 or X670? You can get B550 (or B450 even) for a fraction of the price of a high-end X570 board. And the X670 was literally just launched a week ago, cheaper B660 boards will come too.
Intel does the exact same thing, launching expensive Z boards first and cheaper H/B boards later.
And from your other comment here...
a 5800x or 5800x 3d on it's cost as much as an i7 + a motherboard
WTF are you smoking? The 5800X is $270. That's the same price as the i5-12600K. And there's also the Ryzen 5700X a bit below that, at $240.
Do you think it's still 2 years ago and Ryzen prices haven't changed from MSRP? When was the last time you looked at prices? A 5600 is $160, a 5700X is $240, a 5900X is $400, and a 5950X is $550 right now on PCPartPicker.
Sure, the 5800X3D is more expensive at $420, but it beats the $380 12700K in gaming and wipes the floor with any previous gen i7.