Mopar's first V-8 was a Hemi. The only reason they got away from that design was simple economics. When they needed a horsepower boost, they went back to that design. When they needed a modern V-8 to compete globally, they again turned to the Hemispherical combustion chamber. And today, it is the design of choice for the fastest and quickest vehicles on earth.

Does anyone here believe that the current crop of Demons, Hellcats, and Redeyes would be as fast/efficient with wedges rather than Hemis?

Our wedges are certainly great engines. But the hemispherical combustion chamber that allows for a better valve arrangement is simply much more efficient. And when taken to it's logical extremes, cannot be beat. That continues to be proven over and over again. Any mod or improvement to a wedge head can be trumped by modifications to a Hemi head. The only times that a wedge head wins is when a Hemi head is saddled with half measures.

Now, it is a fair argument that in many applications (actually most applications), the additional complexity and expense of the Hemi design is not worth the trouble given the level of performance being sought. But then the argument becomes performance bang-for-the-buck, not overall superiority. Which is essentially the same decision that Mopar came to in the late 50s.