I have to agree this is an upsetting and obvious ploy by Lucid to get more people to pony up to the DE. But instead of adding more nice touches to the DE to increase its appeal, they're taking stuff away from the GT... not a good approach after specifically showing that option in press cars, in the current demo cars, in the new showroom GTs...
Very upsetting.
And I guarantee it will be back in the future, because there's no possible way they put in the R&D and design work for the HUD just for a limited run special edition car. It will certainly be added as an option package later. Reminds me of how when the Air Touring came out, you couldn't get the massage seats. If you wanted that, you had to step up to the GT. Then a year later, it came back as an a la carte option.
But instead of pushing me now towards really considering the DE, it's turning me off of the whole thing, and making me go back to the strategy of not buying a Gravity in the first year of production... let them do things like this to make as much money off the "must-have-it-first" crowd, then as demand slows, there will be both improvements in the hardware, better fit-and-finish from the factory, and more options like this being made available again.