Motherboards are about the set of features(that the user will actually use) and looks.
The Godlike, and similar boards, are really just showcase boards. "Let's give a board all the bells and whistles, and toss in the kitchen sink too, just because we can."
Few folks are actually going to utilize all the stuff that's loaded on these boards.
I have three 1440p monitors, and the Strix 4090 could not maintain 60 FPS on Forza at max settings.
Did you span the display across all three monitors, instead of running the game on just one of them? That would be a significant ~33% more pixels to drive than 4k.
Is the X870E Godlike worth +$600 to be able to purchase a RTX 5090?
Worth is subjective, as we all view it differently.
Many can't relate, as a 5090 is beyond what they're willing to spend on a GPU, and thus say no on principle; the Godlike motherboard would be no different here.
Some might even say yes, just to see/hear you spend money on a board you didn't really need...
I suppose it comes down to how badly you want a 5090 right now.