https://jalopnik.com/heres-exactly-how-the-2019-gmc-sierras-six-way-tailgate-1823447722 Rube Goldberg now works for GMC ! Gadget America ! And of course the carbon fiber bed .Will they dump big rocks to see if the bed gets damaged ?
I actually think the tailgate is pretty cool if you do construction work or work which requires a lot of hand loading or unloading of heavy items (like concrete bags).
The likelihood that a working contractor would be buying a Denali falls somewhere between slim and none. Whereas the more simplistic, and practical, Ford step is workable across all applications from soccer Dad to professional contractor. And, I imagine, more cost effective.